Marcos Giron (born July 24, 1993; Spanish: Marcos Girón) is an American professional tennis player. He achieved a career-high singles ranking of No. 64 on 12 July 2021 and a doubles ranking of No. 199 on 1 July 2019. He won the men's singles in the Ojai Tennis Tournament in 2011.[1] In 2014, Giron won the singles title at the 2014 NCAA Division I Tennis Championships for UCLA.[2]
2020: Grand Slam debut and maiden win, Top-100 debut, First top-10 win[]
Giron reached the second rounds of a Grand Slam at the 2020 US Open where he won his first Grand Slam main draw match against Marc Polmans in five sets and at the 2020 French Open for the first time in his career.
Giron participated in the main draw as a direct entry at the 2021 Australian Open for a second consecutive year but lost in the first round to 6th seed Alexander Zverev in four sets.[4]
In June 2021, Giron reached the third round of a Grand Slam at the 2021 French Open for the first time in his career.[5]
At the 2021 Halle Open, Giron reached his first quarterfinal at an ATP 500 level tournament as a qualifier where he was defeated by Félix Auger-Aliassime.[6] As a result of this good run, he reached a then career-high of No. 65 on 21 June 2021.