ICC T20I Championship

The ICC T20I Championship is an international Twenty20 cricket competition run by the International Cricket Council. The competition is notional in that it is simply a ranking scheme overlaid on the regular T20I match schedule.[1] After every T20I match, the two teams involved receive points based on a mathematical formula. The total of each team's points total is divided by the total number of matches to give a rating, and all teams are ranked on a table in order of rating.[2]

ICC T20I Championship
AdministratorInternational Cricket Council
FormatTwenty20 International
Tournament formatNotional (ongoing points accumulation through all matches played)
Number of teams84
Current champion England (275 rating)
Most successful Sri Lanka (1064 days)
Longest continuous champion Pakistan (824 days)
Highest rating Pakistan (286 rating)

England currently leads the ICC T20I Championship as of 1 December 2020.[3]

Qualification

According to the ICC website, "teams will need to play six matches against other teams in the previous three to four years to remain in the rankings table." [4]

Points calculations

Time period

Each team scores points based on the results of their matches over the last 34 years all matches played in the 12–24 months since the May before last, plus all the matches played in the 24 months before that, for which the matches played and points earned both count half.[5] Each May, the matches and points earned between 3 and 4 years ago are removed, and the matches and points earned between 1 and 2 years ago switch from 100% weighting to 50% weighting. For example, at May 2014, the matches played between May 2010 and May 2011 were removed, and the matches played between May 2012 and May 2013 switched to 50% weighting (the matches from May 2011 to April 2012 would have already been at 50% following the previous rerating). This happens overnight, so can result in teams changing positions in the ranking table despite not playing.

Find the points earned from a match

Each time two teams play another match, the rankings table is updated as follows, based on the ratings of the teams immediately before they played. To determine the teams' new ratings after a particular match, first calculate the points earned from the match:

If the gap between the ratings of the two teams before the match was less than 40 points, then:

Match result Points earned
WinOpponent's rating + 50
TieOpponent's rating
LoseOpponent's rating 50

If the gap between the ratings of the two teams before the match was at least 40 points, then:

Match result Points earned
Stronger team winsOwn rating + 10
Weaker team losesOwn rating 10
Stronger team tiesOwn rating 40
Weaker team tiesOwn rating + 40
Stronger team losesOwn rating 90
Weaker team winsOwn rating + 90

Example

Suppose Team A, with an initial rating of 100, plays Team B. The table shows the points awarded to the two teams for 9 different initial ratings for B (ranging from 20 to 160), and the three possible match results.

Initial ratings Scenario Team A wins & Team B loses.
Points earned:
Match tied.
Points earned:
Team A loses & Team B wins. Points earned: Total initial ratings Total points earned (All 3 results)
Team ATeam BTeam ATeam BTeam ATeam BTeam ATeam B
10020Initial ratings at least 40 points apartStronger team wins: Own rating + 10110Weaker team loses: Own rating 1010Stronger team ties: Own rating 4060Weaker team ties: Own rating + 4060Stronger team loses: Own rating 9010Weaker team wins: Own rating + 90110120120
1004011030608010130140140
10060110506010010150160160
10070Initial ratings less than 40 points apartWin: Opponent's rating + 50120Lose: Opponent's rating 5050Tie: Opponent's rating70Tie: Opponent's rating100Lose: Opponent's rating 5020Win: Opponent's rating + 50150170170
10090140509010040150190190
1001101605011010060150210210
1001301805013010080150230230
100140Initial ratings at least 40 points apartWeaker team wins: Own rating + 90190Stronger team loses: Own rating 9050Weaker team ties: Own rating + 40140Stronger team ties: Own rating 40100Weaker team loses: Own rating 1090Stronger team wins: Own rating + 10150240240
1001601907014012090170260260

This illustrates that:

  • The winning team earns more points than the losing team. (Unless the ratings are more than 180 apart and the weaker team wins highly unlikely.)
  • Winning always earns a team 100 points more than losing, and 50 more than tying.
  • The total points earned by the two teams is always the same as the total initial ratings of the two teams.
  • The points earned by a winning team increases as the initial rating (quality) of the opposition increases, within the constraints of earning at least its own initial rating + 10, and no more than its own initial rating + 90. A winning team therefore always earns more points than its initial rating, increasing its overall average rating.
  • The points earned by a losing team increases as the initial rating (quality) of the opposition increases, within the constraints of earning at least its own initial rating 90, and no more than its own initial rating 10. A losing team therefore always earns fewer points than its initial rating, decreasing its overall average rating.
  • In a tie, the weaker team usually earns more points than the stronger team (unless the initial ratings are at least 80 apart), reflecting the fact that a tie is a better result for the weaker team than the stronger team. Also, the stronger team will earn fewer points than its initial rating, decreasing its average, and the weaker team more points that its initial rating, increasing its average.
  • For a given result, the rule of how the two teams' points are calculated changes as the initial ratings change, from being based on teams' own ratings when one team is far stronger, to being based on the opponent's ratings when the teams are closely matched, back to being based on own ratings when the other team is far stronger. However, despite these sudden changes in the rule, the number of points awarded for each result changes smoothly as the initial ratings change.

Find the new ratings

  • Each team's rating is equal to its total points scored divided by the total matches played. (Series are not significant in these calculations).
  • Add the match points scored to the points already scored (in previous matches as reflected by the table), add one to the number of matches played, and determine the new rating.
  • Points earned by teams depend on the opponent's ratings, therefore this system needed to assign base ratings to teams when it started.

Current rankings

ICC T20I Championship
RankTeamMatchesPointsRating
1  England256,877275
2  Australia226,047275
3  India359,319266
4  Pakistan266,824262
5  South Africa205,047252
6  New Zealand256,122245
7  Sri Lanka235,293230
8  Bangladesh204,583229
9  Afghanistan173,882228
10  West Indies265,885226
11  Ireland295,513190
12  Zimbabwe213,984190
13  United Arab Emirates234,288186
14  Scotland173,096182
15    Nepal234,148180
16  Papua New Guinea213,769179
17  Netherlands264,618178
18  Oman183,169176
19  Namibia192,980157
20  Singapore202,835142
21  Canada151,956130
22  Qatar232,982130
23  Hong Kong232,727119
24  Kenya121,389116
25  Jersey212,423115
26  Kuwait161,765110
27  Italy101,100110
28  Saudi Arabia9965107
29  Denmark1097598
30  Bermuda131,20292
31  Uganda1198590
32  Malaysia292,55788
33  Germany151,30487
34  United States1186879
35  Ghana1077377
36  Guernsey1393572
37  Botswana1393472
38  Austria855369
39  Nigeria161,06567
40  Norway849962
41  Romania1060260
42  Spain1376659
43  Sweden316856
44  Tanzania316756
45  Cayman Islands843054
46  Belgium1050951
47  Argentina1261051
48  Philippines524148
49  Bahrain942447
50  Vanuatu1570449
51  Belize520942
52  Hungary416241
53  Malawi1247640
54  Fiji310535
55  Peru929433
56  Panama516232
57  Japan412632
58  Costa Rica412632
59  Samoa721631
60  Czech Republic1647830
61  Mexico1132029
62  Luxembourg1230125
63  Portugal717325
64  Finland920423
65  Bulgaria1124022
66  Thailand1429721
67  Isle of Man47920
68  South Korea47820
69  Malta1016617
70  Mozambique1217314
71  Brazil912314
72  Bhutan78813
73  Sierra Leone56112
74  Maldives1413810
75  Chile9859
76  Saint Helena6559
77  Indonesia4195
78  Myanmar6234
79  Gibraltar700
80  Gambia600
81  China600
82  Turkey500
83  Eswatini300
84  Rwanda300
85  Lesotho300
Reference: ICC page, ICC rankings for Tests, ODIs, Twenty20 & Women, 1 December 2020
"Matches" is the number of matches played in the 12-24 months since the May before last, plus half the number in the 24 months before that.

Historical ICC T20I Champions

This table lists the teams that have historically held the highest rating since the T20I ranking was introduced.

Country Start End Duration Cumulative Highest Rating
 England24 October 2011[6]7 August 2012 [7]289 days289 days140
 South Africa8 August 201211 September 201235 days35 days137
 England12 September 201221 September 201210 days299 days130
 South Africa22 September 201228 September 20127 days42 days134
 Sri Lanka29 September 201227 March 2014545 days545 days134
 India28 March 20142 April 20146 days6 days130
 Sri Lanka3 April 20143 April 20141 day546 days131
 India4 April 20145 April 20142 days8 days132
 Sri Lanka6 April 201430 April 201425 days571 days133
 India1 May 20146 September 2014129 days137 days131
 Sri Lanka7 September 20149 January 2016490 days1061 days135
 West Indies10 January 201630 January 201621 days21 days118
 India31 January 20168 February 20169 days146 days120
 Sri Lanka9 February 201611 February 20163 days1064 days121
 India12 February 20163 May 201682 days228 days127
 New Zealand4 May 201631 October 2017546 days546 days132
 Pakistan1 November 20173 November 20173 days3 days124
 New Zealand4 November 20176 November 20173 days549 days124
 Pakistan7 November 20172 January 201857 days60 days124
 New Zealand3 January 201827 January 201825 days574 days128
 Pakistan28 January 201830 April 2020824 days884 days286
 Australia1 May 20205 September 2020128 days128 days278
 England6 September 20207 September 20202 days301 days273
 Australia8 September 202030 November 202084 days212 days275
 England1 December 2020Present275
Last updated 1 December 2020

The summary of teams that have held the highest rating by days, are:

Team Total Days Highest Rating
 Sri Lanka1064135
 Pakistan884286
 New Zealand574132
 England301273
 India228132
 Australia212278
 South Africa42137
 West Indies21118

See also

References

  1. "Twenty20 rankings launched with England on top". 24 October 2011. Retrieved 24 October 2011.
  2. "David Richardson previews the release of the Reliance ICC T20I Rankings". Retrieved 24 October 2011.
  3. "South Africa v England: Dawid Malan & Jos Buttler share 167 as tourists win series 3-0". BBC Sport. 1 December 2020. Retrieved 1 December 2020.
  4. "ICC unveils Global Men's T20I Rankings Table featuring 80 teams". Retrieved 3 May 2019.
  5. "FAQs on ICC T20I Team Rankings". Qn4,5, ICC. Retrieved 16 March 2016.
  6. "ICC rankings - ICC Test, ODI and Twenty20 rankings". 25 October 2011. Archived from the original on 25 October 2011. Retrieved 16 December 2018.
  7. "England rise to No.1 in ODIs". ESPNcricinfo.
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