| ATP - Madrid | 04/30 16:40 | 25 | [53] Marcos Giron v Alejandro Tabilo [91] | 3-6,5-7 | |
| ATP - Munique | 04/26 14:30 | 25 | [72] Hugo Gaston v Marcos Giron [53] | 6-4,6-7,7-5 | |
| ATP - Barcelona | 04/18 09:00 | 24 | [55] Marcos Giron v Federico Coria [52] | 2-6,6-3,1-6 | |
| ATP - Monte Carlo | 04/10 11:35 | 24 | [45] Alejandro Davidovich Fokina v Marcos Giron [53] | 7-5,6-3 | |
| ATP - Houston | 04/06 02:00 | 25 | [30] Frances Tiafoe v Marcos Giron [53] | 6-4,6-4 | |
| ATP - Miami | 03/24 21:20 | 23 | [55] Marton Fucsovics v Marcos Giron [52] | 6-3,6-4 | |
| ATP - Indian Wells | 03/10 21:25 | 23 | [55] Marcos Giron v Lorenzo Musetti [56] | 3-6,5-7 | |
| ATP - Acapulco | 02/25 00:30 | 27 | [59] Marcos Giron v Stefanos Tsitsipas [4] | 3-6,4-6 | |
| ATP - Acapulco | 02/24 00:00 | 26 | [17] Pablo Carreño Busta v Marcos Giron [59] | 7-6,4-6,6-7 | |
| ATP - Acapulco | 02/23 01:40 | 25 | [80] John Millman v Marcos Giron [59] | Retired | |
| ATP - Delray Beach | 02/17 18:00 | 26 | [91] John Millman v Marcos Giron [64] | 6-3,7-6 | |
| ATP - Delray Beach | 02/15 19:20 | 25 | [161] Tennys Sandgren v Marcos Giron [64] | 5-7,3-6 | |
| ATP - Dallas | 02/13 01:00 | 28 | [70] Marcos Giron v Jenson Brooksby [54] | 4-6,7-6,6-7 | |
| ATP - Dallas | 02/11 19:30 | 27 | [19] Taylor Fritz v Marcos Giron [70] | 4-6,6-3,6-7 | |
| ATP - Dallas | 02/09 20:05 | 26 | [121] Liam Broady v Marcos Giron [70] | 6-3,3-6,1-6 | |
| ATP - Dallas | 02/08 18:00 | 25 | [163] Tennys Sandgren v Marcos Giron [70] | 4-6,4-6 | |
| Open da Austrália | 01/17 03:35 | 23 | [66] Marcos Giron v Rafael Nadal [5] | 1-6,4-6,2-6 | |
| ATP - Sydney | 01/10 04:45 | 25 | [75] Jordan Thompson v Marcos Giron [66] | 6-4,6-2 | |
| ATP - Melbourne | 01/05 00:00 | 25 | [104] Ricardas Berankis v Marcos Giron [66] | 7-5,6-4 | |
| ATP - Estocolmo | 11/08 13:00 | 25 | Peter Gojowczyk v Marcos Giron | Cancelled | |
| ATP - Paris | 11/04 18:30 | 26 | [8] Casper Ruud v Marcos Giron [57] | 6-2,6-1 | |
| ATP - Paris | 11/03 17:35 | 25 | [57] Marcos Giron v Diego Schwartzman [15] | 7-6,7-6 | |
| ATP - Paris | 11/02 20:10 | 24 | [41] Frances Tiafoe v Marcos Giron [57] | 7-6,4-6,3-6 | |
| ATP - Paris | 10/31 10:00 | 19 | [60] Marcos Giron v Norbert Gombos [108] | 6-1,7-5 | |
| ATP - Paris | 10/30 10:25 | 14 | [60] Marcos Giron v Gilles Simon [122] | 6-7,6-4,7-5 | |
| ATP - Viena | 10/23 12:25 | 14 | [59] Marcos Giron v Norbert Gombos [103] | 6-7,4-6 | |
| ATP - Indian Wells | 10/10 02:20 | 24 | [59] Marcos Giron v Filip Krajinovic [34] | 6-7,5-7 | |
| ATP - Indian Wells | 10/07 21:15 | 23 | [59] Marcos Giron v Botic Van De Zandschulp [66] | 6-7,6-2,6-4 | |
| ATP - Sófia | 10/02 13:00 | 28 | [67] Marcos Giron v Gael Monfils [20] | 5-7,0-6 | |
| ATP - Sófia | 10/01 11:00 | 27 | [55] John Millman v Marcos Giron [67] | 4-6,2-6 |
Wikipedia - Marcos Giron
Marcos Andres Giron (born July 24, 1993; Spanish: 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. In 2014, Giron won the singles title at the 2014 NCAA Division I Tennis Championships for UCLA.