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Oskar Jansson is a 21-year-old Swedish professional on the ATP tour with 1 ranking points. Jansson carries an ELO rating of 1508 over 53 rated matches, strongest on clay (1508). Jansson's next scheduled points drop is 1 point from M25 Gentofte 1 on August 3, 2026, when that result rolls off the 52-week ranking, and 6 results currently count toward Jansson's ranking total.
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From matches in our dataset (2023–present).
Biggest upset victories — matches Oskar Jansson won as the betting underdog, ranked by pre-match odds.
Oskar Jansson’s wins over the highest-rated opponents, by the opponent’s pre-match ELO (since 2023).
Erik GreveliusM15 Kalmar 1 2023 · 6-4 4-6 6-4ELO 1517def. 
Mac VisserM15 Rosbach 2026 · 6-3 3-1 ret.ELO 1515def. 
Timo Rosenkranz KoenigM15 Slovenska Bistrica 2026 · 6-2 1-6 10-5ELO 1513def. Patrik MunkhammarM15 Bastad 2 2025 · 6-4 0-6 10-8ELO 1510def. 
Mika LippM15 Kalmar 1 2023 · 6-4 6-4ELO 15001-match win streak · Last match Jun 29, 2026 · last win Jun 29, 2026
Oskar Jansson's most-played opponents. Open any rivalry for the full meeting record and a win-probability prediction.
Henrik Heise Korsgaard