2022. Ranked No. 49 at the French Open, he was defeated in the first round by 18th seed and world No. 21, Grigor Dimitrov. Giron started his grass-court season at the BOSS Open in Stuttgart. He lost in the first round to German wildcard, Jan-Lennard Struff, despite having two match points in the third set tiebreak. At the Halle Open, he was defeated in the first round by fourth seed and world No. 9, Félix Auger-Aliassime. In Mallorca, he reached the quarterfinals where he lost to second seed, world No. 6, and eventual champion, Stefanos Tsitsipas. Ranked No. 65 at Wimbledon, he upset 24th seed and world No. 29, Holger Rune, in the first round. He lost in the second round to Alex Molčan. Giron started his US Open series at the Atlanta Open. He lost in the first round to Kwon Soon-woo; he led by a break in the third set, but he was unable to get the victory. At the Citi Open in Washington, D.C., he was defeated in the first round by 2019 champion and eventual champion, Nick Kyrgios. Getting past qualifying at the National Bank Open in Montreal, he lost in the first round to 15th seed and world No. 18, Roberto Bautista Agut. Making it past qualifying at the Western & Southern Open, he beat fellow qualifier and 2019 finalist, David Goffin, in the first round. He was defeated in the second round by 15th seed and world No. 19, Bautista Agut. Ranked No. 56 at the US Open, he lost in the first round to 22nd seed, world No. 26, compatriot, and eventual semifinalist, Frances Tiafoe. Seeded third at the San Diego Open, Giron reached his maiden ATP tour final after defeating top seed and world No. 25, Dan Evans, in his semifinal match. He lost in the final to 5th seed and compatriot, Brandon Nakashima. Singles performance timeline Current through the 2023 Abierto Mexicano Telcel. ATP career finals Singles: 1 (1 runner-up) ATP Challenger and ITF Futures finals Singles: 13 (8–5) Doubles: 9 (5–4) Record against other players Record against top 10 players Giron's record against players who have been ranked in the top 10, with those who are active in boldface. Only ATP Tour main draw matches are considered: Wins over top 10 players He has a record against players who were, at the time the match was played, ranked in the