Named after Ulysses, a king in Greek mythology renowned for adapting to difficult situations.
Nicknames are Uliand Pantera.
Speaks English and Spanish.
Father, Ernesto, was a skier; brothers, Dali and Darwin, and sister, Krystal, all play tennis.
Lists his father as biggest influence on his career, stating that he "has been there from the start and is my biggest critic and supporter."
Born in Puerto Rico to Spanish parents. Father worked for Coca-Cola and family lived in China, India and Thailand for his job.
Started playing tennis at age 5 in Thailand and begantraining in Argentina at age 13.
Favourite shot is serve and tournament is US Open.
Enjoys playing on all surfaces.
Tennis idol is Jo-Wilfried Tsonga.
Also enjoys playing and watching football. Supports River Plate, FC Barcelona and Lionel Messi.
If he wasn't a tennis player, he would be a football player.
Favourite superhero is TheFlash,TV show is Peaky Blinders and favourite musician is Akon.
Likes reading the Percy Jackson and the Olympians book series by Rick Riordan.
Enjoys eating Argentinean barbecue.
(UPDATED 17 AUGUST 2020)
Achieved career-high No. 240 on 9 March 2020 after reaching Monterrey, MEX Challenger SF.Rose from No. 419 to No. 265 on 13 January 2020 after winning Ann Arbor, USA Challenger title.
Set to make tour-level debut at 2020 US Open as WC. Fell in qualifying at 2016 Washington, 2017 Washington, 2018 US Open and 2019 Geneva.
Owns 39-31 record on ATP Challenger Tour, highlighted by 14-5 start to 2020. Won Challenger titles at 2018 Perugia, ITA as LL and 2020 Ann Arbor, USA. Defeated former World No. 9 Almagro en route to Perugia title.
Peaked at No. 2 in junior rankings on 20 June 2016. Played 324 singles and doubles matches on ITF Junior Circuit from 2013-16.
Went 131-63 in junior singles, including wins over future Top-20 ATP players de Minaur and Tsitsipas. Went 79-51 in junior doubles, including win w/Kirkov over future Top-20 ATP players Auger-Aliassime/Shapovalov. Posted best Grand Slam results at2016 Wimbledon, reaching boys' singles SF and boys' doubles QF w/Kirkov.