UAAP Season 73 men's basketball tournament

After the opening ceremonies hosted by La Salle, their varsity team blew out UP in the opening game, reminiscent of the opening game blow out during the 2007 tournament where State U finished with a 0–14 record. In the second game, UST won over UE, on what was said to be an upset win over last year's runners-up.[12] Adamson won over NU the next day, and what was rated to be an early match-up of the top two teams, FEU won over Ateneo in a tight contest.[13] FEU won their next six games, sweeping the elimination round;[14] Ateneo on the other hand, after winning another tight game against Adamson,[15] finished second after the first round; their own other loss coming from their arch rivals La Salle, in which the Green Archers capitalized on Kirk Long going to the bench in the final minutes after fouling out.[16] The referees of the Adamson-Ateneo game were later suspended for errant calls that cost Adamson the game.[17]

Adamson came back after their loss against Ateneo and won two straight against UP[18] and UST.[19] After the loss to Adamson, UP head coach Aboy Castro filed for an indefinite leave of absence from the squad; team consultant Boyet Fernandez was then appointed as interim head coach.[20] On UP's next game, UST was saved by Jeric Fortuna's three-point shots to force overtime and defeat UP.[21]

UE was unable to secure wins against FEU[21] and NU, while the Bulldogs also suffered a loss against the Tamaraws,[18] before winning against UE.[22] They were beaten anew by UST in another close game,[23] while the Tigers themselves lost to the Green Archers[24] and Tamaraws to cap off their first round with a 3–4 record.[14] UP was still unable to win against UE (which won their first game of the season against them)[25] and Ateneo.[26]

La Salle ended their first round with two-point loss against Adamson, which made the Falcons within striking distance from FEU and Ateneo in the standings. Ateneo finished the first round with a triumph against last year's Finals nemesis UE in a close game until the Eagles pulled away late in the fourth quarter.[27]

The Tigers opened the second round with another loss, this time against UE; this led to the two teams being tied with 3–5 records. On the next game, Adamson cut FEU's 7-game winning streak with a one-point loss against Adamson. This assured that there will be no "stepladder" format during the playoffs. Ateneo extended their three-game winning streak to four games after a blowout win against the FIghting Maroons; UP then had a record of 0–8.

La Salle split their season series against NU with a win to move past the .500 barrier. FEU was brought to another close game, this time against UE, but the Tamaraws were able to defeat the Red Warriors via overtime to notch their first second round win. Off from their win against FEU, Adamson needed two overtime periods to win over UST. The loss effectively close the door for a semifinal appearance for the Tigers.

La Salle and Ateneo had similar wins against UP and NU, respectively, with La Salle winning by 21 points while Ateneo won by twenty.

Off from their win against FEU, and a double-overtime win against UST, Adamson was upset by UE, which by then had two wins in nine games. FEU won over UST, which then had lost five consecutive games, to remain first and clinch the first semifinal berth. Adamson then won against UP, their 11th consecutive loss. The Red Warriors, which had to win all of their remaining games to have shot at the FInal Four, shocked Ateneo in what could be a start of an improbable playoff run.

NU won over UP by two points after a controversial non-call by the referees. Fighting Maroon Mark Juruena had earlier been called for five consecutive lane violations with UP trailing by two points with 1.2 seconds left; UP coach Boyet Fernandez instructed Juruena to deliberately cross the lane while NU's Jewel Ponferrada was attempting his free-throw hoping to tempt NU to do the same act and force a double lane violation (subsequently a jump ball at center court, the possession arrow rule is suspended during the last two minutes of a game); the referees did not call the violation and UP coach Fernandez rushed to commissioner Badolato afterward to plead his case.[28] In their rivalry game against Ateneo, La Salle came up short as Ateneo won, 74–57.

UST extended UP's woes with another close game, and ended their own five-game losing streak. Off from a loss against Ateneo, La Salle had an upset win against FEU. In what was an elimination game for UE if they lose, UE had their two-game winning run snapped by NU, which then eliminated the Red Warriors from contention.

With their last 25 games against Ateneo all losing efforts, Adamson had to win against the Eagles in order to have a realistic chance for a twice-to-beat advantage; however, Ateneo held on to the win, but not after Jumbo Escueta was ejected when a patch fell off his shorts, rendering his uniform dissimilar to his teammates. With the win, Ateneo clinched a semifinals berth.[29]

FEU won against NU, while La Salle outlasted UST to remain in the top two teams in the standings. In a last-ditch attempt to secure at least a playoff for a twice-to-beat advantage, La Salle was beaten by also-ran UE; Adamson also suffered the same fate, losing to NU to clinch FEU and Ateneo the twice-to-win advantages. FEU then won against UP, their thirteenth loss in the season, and Ateneo won over UST to set up a virtual game for the #1 seed.

UST ended the season with another loss, this time against NU. This placed NU on the .500 mark, and gave UST coach Pido Jarencio his worst finish as a UAAP head coach. In a virtual playoff for the #3 seed, Adamson won by five points to relegate La Salle to the #4 seed. UE ended the season in a two-game winning streak, beating UP. UP finished the season winless, and had their 18th consecutive loss, including games from the previous season. FEU won over Ateneo after Terrence Romeo and RR Garcia scored on a deciding 8–0 run to lead FEU to victory.