| ATP - Madrid | 04/29 13:40 | 24 | [31] Sebastian Baez v Marcos Giron [61] | 3-6,6-3,6-4 | |
| ATP - Madrid | 04/27 13:10 | 23 | [74] Nuno Borges v Marcos Giron [61] | 2-6,6-7 | |
| ATP - Munique | 04/21 15:05 | 27 | [68] Marcos Giron v Botic Van De Zandschulp [29] | 6-7,3-6 | |
| ATP - Munique | 04/20 09:00 | 26 | [68] Marcos Giron v Alexander Ritschard [209] | 4-6,6-3,6-3 | |
| ATP - Munique | 04/17 09:00 | 25 | [49] Roberto Carballes Baena v Marcos Giron [67] | 1-6,7-5,2-6 | |
| ATP - Houston | 04/08 19:20 | 26 | [69] Marcos Giron v Tomas Machac [138] | 4-6,4-6 | |
| ATP - Houston | 04/04 19:55 | 25 | [69] Marcos Giron v Emilio Gomez [99] | 6-0,6-2 | |
| ATP - Miami | 03/23 16:00 | 23 | [71] Marcos Giron v Cristian Garin [82] | 4-6,6-2,4-6 | |
| ATP - Indian Wells | 03/11 05:00 | 24 | [16] Frances Tiafoe v Marcos Giron [73] | 6-2,6-2 | |
| ATP - Indian Wells | 03/08 19:00 | 23 | [73] Marcos Giron v Aleksandar Kovacevic [107] | 6-3,7-5 | |
| ATP - Acapulco | 02/28 00:00 | 25 | [69] Marcos Giron v Michael Mmoh [86] | 6-7,1-6 | |
| ATP - Delray Beach | 02/17 18:40 | 27 | [55] Marcos Giron v Miomir Kecmanovic [33] | 6-7,3-6 | |
| ATP - Delray Beach | 02/15 23:00 | 26 | Marcos Giron v Matija Pecotic | 6-3,6-3 | |
| ATP - Delray Beach | 02/15 01:25 | 25 | [42] Ben Shelton v Marcos Giron [55] | 4-6,4-6 | |
| ATP - Dallas | 02/11 01:00 | 27 | [8] Taylor Fritz v Marcos Giron [55] | 7-6,3-6,6-3 | |
| ATP - Dallas | 02/10 02:55 | 26 | [80] Oscar Otte v Marcos Giron [55] | 4-6,3-6 | |
| ATP - Dallas | 02/07 18:00 | 25 | [378] Alex Rybakov v Marcos Giron [55] | 4-6,7-6,1-6 | |
| Open da Austrália | 01/16 10:45 | 23 | [56] Marcos Giron v Daniil Medvedev [8] | 0-6,1-6,2-6 | |
| ATP - Auckland | 01/12 01:30 | 27 | [60] Marcos Giron v Cameron Norrie [12] | 1-6,7-6,2-6 | |
| ATP - Auckland | 01/10 22:45 | 26 | [66] J.J. Wolf v Marcos Giron [60] | 4-6,4-6 | |
| ATP - Auckland | 01/09 23:00 | 25 | [60] Marcos Giron v Federico Coria [76] | 6-7,6-4,7-5 | |
| ATP - Auckland | 01/09 22:00 | 25 | Marcos Giron v Pedro Martinez | Cancelled | |
| ATP - Adelaide | 01/04 10:00 | 26 | [61] Marcos Giron v Alexei Popyrin [120] | 6-4,4-6,3-6 | |
| ATP - Adelaide | 01/01 05:20 | 25 | [61] Marcos Giron v Richard Gasquet [68] | 7-6,6-7,7-5 | |
| ATP - Paris | 10/29 18:30 | 46 | [58] Marcos Giron v Jiri Lehecka [78] | 5-7,3-6 | |
| ATP - Viena | 10/28 12:00 | 27 | [32] Grigor Dimitrov v Marcos Giron [58] | 6-3,4-6,6-4 | |
| ATP - Viena | 10/27 11:00 | 26 | [58] Marcos Giron v Cameron Norrie [13] | 6-3,6-4 | |
| ATP - Viena | 10/26 11:00 | 25 | [71] Tallon Griekspoor v Marcos Giron [58] | 4-6,2-6 | |
| ATP - Antuérpia | 10/19 12:55 | 25 | [60] Marcos Giron v Sebastian Korda [36] | 3-6,7-6,4-6 | |
| ATP - Gijón | 10/12 18:00 | 26 | [165] Dominic Thiem v Marcos Giron [62] | 3-6,6-4,6-0 |
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.