[8][9] His uncle, Harry Fritz, also played professional tennis[10] and competed in the longest Davis Cup match of all time (by number of games).

He attended Torrey Pines High School, where he won the CIF singles title in the San Diego section as a freshman.

A few months into his sophomore year, he switched to an online high school to play full-time ITF junior events.

He would not play another event until the 2013 Junior US Open, at which point he began to compete regularly on the ITF Circuit shortly before turning 16.

He quickly rose from the 600s into the top 250 of the ATP rankings by becoming the 9th player at age 17 to win multiple Challenger Tour titles – doing so in back-to-back weeks.

Fritz was able to achieve his first victory over a top ten ATP player at Indian Wells defeating sixth seed Marin Čilić in the second round.

Fritz struggled through the first half of the year with injury problems and ended up skipping the clay court season to focus on recovering.

In his seventh grand slam appearance, Fritz won his first match at a major tournament by knocking out Marcos Baghdatis at the US Open.

Following a loss in qualifying at the Australian Open, he then won his first Challenger title in two years at the inaugural event in Newport Beach, not too far from his current residence in Palos Verdes.

At the US Open, Fritz reached his first Grand Slam third round, defeating Mischa Zverev and Jason Kubler, before losing to 9th-seeded Dominic Thiem in four sets.

Earlier in the season, Fritz began working with Paul Annacone, who helped him reach a career-high ranking of world No.

Fritz then went on to win the Challenger at Newport Beach, California; he defeated Brayden Schnur of Canada in the final, in straight sets.

In June, Fritz won his first ATP Tour title at the Eastbourne International by defeating Sam Querrey in straight sets.

[39] Fritz would end up returning in time to play Wimbledon and proceeded to make the third round, where he lost to Alexander Zverev.

He defeated Félix Auger-Aliassime of Canada and Cameron Norrie of Great Britain, but lost to Alexander Zverev of Germany.

Seeded third, he suffered a second-round upset at the hands of Dutch wildcard and eventual champion, Tim van Rijthoven.

[70] Seeded fourth at the Queen's Club Championships, he was ousted from the tournament in the first round by British wildcard Jack Draper.

[73] Seeded 11th at Wimbledon, he defeated Alex Molčan and qualifier Jason Kubler in the third and fourth rounds respectively to reach his first Major quarterfinal.

[78] In Cincinnati, Fritz reached the quarterfinals after beating Sebastián Báez, Nick Kyrgios and sixth seed and world No.

[85] On November 5, with Carlos Alcaraz's withdrawal after an abdominal injury, Fritz qualified for the 2022 ATP Finals, the first American to participate since John Isner in 2018.

[89] He then lost to third seeded Casper Ruud but won against Félix Auger-Aliassime to book his spot in the semifinals, the first American since Jack Sock in 2017 to reach this level.

[108][109] In Paris he withdrew before the second round due to injury and put an early end of the season, although potentially still filling in as an alternate at the 2023 ATP Finals.

[110] He reached his first quarterfinal at the Australian Open defeating seventh seed and previous year runner-up Stefanos Tsitsipas in four sets.

[116] He defeated 21st seed Francisco Cerúndolo, for his 250th career win making him the sixth man born in 1995 or later to reach that milestone.

[121] Seeded third, he reached the Paris Olympics semifinals with Tommy Paul, and won the bronze medal defeating the duo from Czechia, Tomáš Macháč and Adam Pavlásek.

[122] Seeded 12th at the US Open, Fritz reached his first Grand Slam semifinal defeating Camilo Ugo Carabelli, Matteo Berrettini, Francisco Comesaña, world No.

[123] By reaching the semifinals, he set up an all-American matchup with Frances Tiafoe, who won later in the day, the first at a Grand Slam since 2005 at the US Open, when Andre Agassi and Robby Ginepri met.

With a mix of humor and sincerity, Fritz admitted in an interview on the Nothing Major podcast that the aftermath of the loss was tough to handle, revealing that it took a toll on him emotionally.

[126] In November at the ATP Finals, Fritz reached the semifinals after recording two wins and one loss in the group stages, beating Daniil Medvedev and Alex De Minaur.

[134] One of Fritz's defining strengths is his ability to hit sharp angle cross-court shots on both the backhand and forehand sides.