Marcos Giron

He later beat 8th seed John Millman in 70 minutes to move into his first career ATP tour-level semifinal, where he lost to second seed Gaël Monfils.

As a result, he reached a new career-high ranking in the top 60, at world No. 59 on October 4, 2021.

Giron started his 2022 season at the first edition of the Melbourne Summer Set 1.

He lost in the first round to qualifier Ričardas Berankis.

At the Sydney Classic, he was defeated in the first round by Australian wildcard Jordan Thompson.

Marcos Andres Giron (born July 24, 1993; Girón) is an American professional tennis player.

He achieved a career-high singles ranking of No. 44 on 19 Feb 2024 and a doubles ranking of No. 194 on August 1, 2022.

He won the boys' singles in the Ojai Tennis Tournament in 2009 and the men’s invitational in 2011.

At the Australian Open, he was beaten in the first round by 6th seed, world No. 5, 2009 champion, and eventual champion Rafael Nadal.

He beat 10th seed, Adrian Mannarino, in the second round.

He lost in the third round to eighth seed and eventual champion, Dan Evans.

He participated in the main draw as a direct entry at the Australian Open for a second consecutive year.

He lost in the first round to sixth seed and world No. 7, Alexander Zverev, in four sets.

At the Open Sud de France, Giron was defeated in the first round by qualifier Tallon Griekspoor.

Getting past qualifying at the Rotterdam Open, he was eliminated in the first round by fourth seed, world No. 8, and eventual champion, Andrey Rublev.

In June, Giron reached the third round of a major at the French Open for the first time in his career.

At Halle, Giron reached his first quarterfinal at an ATP 500 level tournament as a qualifier where he was defeated by Félix Auger-Aliassime.

As a result of this good run, he reached a then career-high of No. 65 on June 21, 2021.

Giron made the second round at the Olympics, beating Norbert Gombos before losing to Kei Nishikori in three sets.

In September at the Sofia Open, Giron reached his fourth quarterfinal of the season (with quarterfinal appearances in Halle, Metz and Winston-Salem) after defeating third seed Alex de Minaur in the second round.

In 2014, Giron won the singles title at the 2014 NCAA Division I Tennis Championships for UCLA.

Giron was born in Thousand Oaks, California to Argentine and Ecuador parents.

Giron reached the second round of a major for the first time at the US Open where he defeated Marc Polmans in five sets.

A month later, he reached the second round of the French Open, defeating Quentin Halys in five sets.

In both victories, he came back from a two-sets-to-one deficit.

In November, Giron recorded his first top-ten win against seventh seed Matteo Berrettini at the Paris Masters.

Giron started his 2021 season at the Murray River Open, an event that was organized as a lead-up tournament to the Australian Open due to other tournaments in Australia being cancelled as a result from the COVID-19 pandemic.

Seeded 7th at the first edition of the Dallas Open, Giron upset world No. 19 Taylor Fritz in the quarterfinals to reach his second ATP tour semifinal.

He lost in his semifinal match to 4th seed Jenson Brooksby in three sets despite holding four match points.

In Delray Beach, he was defeated in the second round by John Millman.

At the Mexican Open in Acapulco, he upset eighth seed and world No. 17 Pablo Carreño Busta in the second round.

He lost in the quarterfinals to third seed and world No. 4 Stefanos Tsitsipas.

At the Indian Wells Masters, he was eliminated in the first round by Lorenzo Musetti.

In Miami, he lost in the first round to Márton Fucsovics.

Giron started his clay-court season at the U.S. Men's Clay Court Championships.

He lost in the first round to world No. 30 Frances Tiafoe.

At the Monte-Carlo Masters, he was defeated in the first round by eventual finalist Alejandro Davidovich Fokina.

In Barcelona, he lost in the first round to Federico Coria.

At the BMW Open in Munich, he fell in the first round to Hugo Gaston.

At the Madrid Open, he was beaten in the first round of qualifying by Alejandro Tabilo.