Reilly Opelka

Opelka made his ATP debut at the 2016 U.S. Men's Clay Court Championship, where he lost in the first round to fifth seed Sam Querrey. In August, Opelka won his first three career ATP matches at the BB&T Atlanta Open to reach the semi-finals at just his 3rd career ATP event. This included a victory over 203 cm player No. 27 Kevin Anderson in which he saved two match points on Anderson's serve. He lost in the semi-finals to top seed John Isner. He continued his momentum with first round wins at the Los Cabos Open and the Cincinnati Masters where he defeated Sergiy Stakhovsky and Jérémy Chardy respectively to move into the Top 300 of the ATP rankings. After struggling with a foot injury towards the end of the summer, Opelka returned to the USTA Pro Circuit for the indoor season and won his first ATP Challenger title in Charlottesville to finish the year just outside the Top 200.

In 2017, Opelka got off to a good start to the season by qualifying for the Australian Open. He played No. 11 seed David Goffin in the first round and pushed him to five sets before taking the loss. At the 2017 Memphis Open, he recorded his only ATP Tour level win of the year over fellow Next Gen American Jared Donaldson.

2018 proved to be a breakthrough year for Opelka. He won three ATP Challenger titles in the year, becoming first American to achieve the feat since Bradley Klahn in 2014.[6] He won his first title of the season at the Bordeaux Challenger in May.[7] In November he won back to back titles at the Knoxville Challenger[8] and the JSM Challenger.[6] He also finished as a runner-up at Cary Challenger and Oracle Challenger.[9]

On the ATP world Tour, he reached the quarterfinals at the Delray Beach Open, picking up his first top 10 win of his burgeoning career, defeating world No. 8 Jack Sock in the second round over three sets.

His solid performance at the ATP Challenger Tour earned him first career Top 100 year end finish in singles, ending the season at 99.

At the Australian Open, Opelka created a huge upset when he defeated compatriot John Isner in the first round. This was the second top 10 win of his career.[10] In February, Opelka again knocked off John Isner on the way to his first ATP title, the New York Open. At Wimbledon, in July, he achieved his best Grand Slam result to date, making it to the tournament's third round and knocking out Stan Wawrinka in the process. Over the summer and fall, he reached the semifinals of tournaments in Atlanta, Tokyo, and Basel solidifying his standing amongst the best tennis players in the world. In November, he participated in the Davis Cup Finals for the United States, ultimately losing both his rubbers. He finished the season ranked 36th in the world.

In February, Opelka lifted his second career trophy, at the Delray Beach Open. After an extended break due to the ongoing COVID-19 pandemic, play resumed and Opelka reached his first ATP Tour Masters level quarterfinal at the Cincinnati Masters usually held in Cincinnati, but held in New York City for safety reasons. He notched his fifth career top 10 win, while there, knocking off Matteo Berrettini.

Current through the 2021 Great Ocean Road Open.

• Opelka has a 6–6 (50.0%) record against players who were, at the time the match was played, ranked in the top 10.

#	Player	Rank	Event	Surface	Rd	Score	RO Rank
2018
1.	Jack Sock	8	Delray Beach, United States	Hard	2R	4–6, 7–5, 6–3	228
2019
2.	John Isner	10	Australian Open, Australia	Hard	1R	7–6(7–4), 7–6(8–6), 6–7(4–7), 7–6(7–5)	97
3.	John Isner	9	New York Open, United States	Hard (i)	SF	6–7(8–10), 7–6(16–14), 7–6(7–4)	89
4.	Roberto Bautista Agut	10	Swiss Indoors, Switzerland	Hard (i)	QF	6–3, 3–6, 6–3	37
2020
5.	Matteo Berrettini	8	Cincinnati, United States	Hard	3R	6–3, 7–6(7–4)	39
6.	Daniil Medvedev	6	St. Petersburg, Russia	Hard (i)	2R	2–6, 7–5, 6–4	36