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Steven Diez is a 35-year-old Canadian professional competing on the ATP tour. Standing 175 cm, Diez is a right-hander with a two-handed backhand. Diez turned professional in 2009 and was born in Toronto, Canada.
Our rating model puts Diez at 1455 ELO across 117 rated matches, strongest on grass (1494).
<a href="https://atprank.com/player/steven-diez"><img src="https://atprank.com/api/card/player/steven-diez" alt="Live tennis ranking — atprank.com" width="640" height="180" /></a>Live card — updates automatically. Free to embed with the atprank.com link.
From matches in our dataset (2023–present).
Biggest upset victories — matches Steven Diez won as the betting underdog, ranked by pre-match odds.
Benjamin BonziPorto Challenger 2023 · 6-4 6-4@4.45def. 
Pablo Llamas RuizTenerife 2 Challenger 2025 · 6-4 6-3@3.26def. Adria Soriano BarreraTenerife 2 Challenger 2025 · 7-6(5) 6-3@2.85def. Andres Santamarta RoigM25 Vic 1 2025 · 6-3 7-5@2.14def. Alberto Barroso CamposM25 Roda de Bara 1 2024 · 6-2 2-6 6-3@2.09Steven Diez’s wins over the highest-rated opponents, by the opponent’s pre-match ELO (since 2023).
Mathys ErhardTenerife 2 Challenger 2025 · 7-6(2) 3-6 6-4ELO 1593def. Pablo Llamas RuizTenerife 2 Challenger 2025 · 6-4 6-3ELO 1587def. Adria Soriano BarreraTenerife 2 Challenger 2025 · 7-6(5) 6-3ELO 1587def. 
Henrique RochaPorto Challenger 2023 · 6-3 6-2ELO 1570def. 
Michiel De KromM25 Vic 1 2025 · 6-1 ret.ELO 1567Steven Diez's most-played opponents. Open any rivalry for the full meeting record and a win-probability prediction.