Steven Diez

Biography
Steven Diez (born March 17, 1991 in Toronto, Ontario, Canada) is a Spanish-Canadian professional tennis player. He reached a career-high ATP singles ranking of No. 134 on November 18, 2019 and a career-high ATP doubles ranking of No. 267 on February 8, 2021.

Raised primarily in and competing for Spain early in his career, Diez has since gone on to represent the country of his birth Canada. In 2014, he reached his first ATP Challenger final but lost to Alejandro Falla in Nouméa. He advanced to the second ATP Challenger final of his career in 2016, losing to Mikhail Kukushkin in Moscow. Also in 2016, he reached the second round of the ATP Masters 1000 Rogers Cup with a win over Kyle Edmund in the first round. He lost to the 12th seed Bernard Tomic in the next round. In 2019, Diez won his first ATP Challenger title at the tournament in Burnie, Australia. Also in 2019, he reached his biggest singles final to date, losing to Yasutaka Uchiyama at the ATP Challenger 125 in Ningbo.

Singles performance timeline
This table is current through the 2022 US Open.

Notes
 * NB The French Open was played in September and after the US Open due to the COVID-19 pandemic in 2020.