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Sofia Costoulas, a 21-year-old Belgian professional, holds the #156 spot in the live WTA rankings with 486 points. Costoulas dropped 1 place in the most recent release. Costoulas is a right-hander.
Costoulas carries an ELO rating of 1610 over 256 rated matches, strongest on hard courts (1572). Costoulas's next scheduled points drop is 21 points from W100 Figueira da Foz 1 on July 27, 2026, when that result rolls off the 52-week ranking, and 18 results currently count toward Costoulas's ranking total.
<a href="https://atprank.com/player/sofia-costoulas"><img src="https://atprank.com/api/card/player/sofia-costoulas" 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 Sofia Costoulas won as the betting underdog, ranked by pre-match odds.
Mona BarthelW35 Amstelveen 1 2024 · 5-7 6-4 6-3@3.32def. 
Arianne HartonoW100 Dubai 1 2024 · 6-4 6-2@2.88def. 
Leolia JeanjeanOpen 35 de Saint-Malo - Saint-Malo 2026 · 4-6 7-6(1) 6-1@2.46def. 
Anastasia ZakharovaW25 Limassol 2023 · 6-2 7-5@2.44def. Anouk KoevermansOeiras Open CETO - Oeiras 2026 · 6-4 6-4@2.40Sofia Costoulas’s wins over the highest-rated opponents, by the opponent’s pre-match ELO (since 2023).
Kaitlin QuevedoASB Classic - Auckland 2026 · 6-2 6-0ELO 1649def. 
Veronika ErjavecASB Classic - Auckland 2026 · 6-3 4-6 6-3ELO 1644def. 
Darja SemenistajaTorneo Internazionale - Rovereto 2025 · 4-6 6-3 6-3ELO 1638def. 
Linda KlimovicovaW75 Calvi 1 2025 · 6-2 7-6(5)ELO 1626def. Lois BoissonW35 Manchester 1 2025 · 4-6 6-4 6-2ELO 1623Last match Jul 14, 2026 · last win May 27, 2026
2 points behind Priscilla Hon at #155.
Points needed to reach each tier, assuming other players’ totals stay the same.
Starts at your live total of 486 pts. The most recent 21 pts don't have a published drop date yet, so they show at an estimated ~52-week date and firm up once the result settles.
Valid results outside the best-18 that don't count toward the ranking right now — they promote in as counting results drop off.
Sofia Costoulas's most-played opponents. Open any rivalry for the full meeting record and a win-probability prediction.