Oona Kauste/Aku Kauste (Hyvinkaa, FIN) lost 9-7 to Johanna Heldin/Daniel Magnusson (Uppsala, SWE) in the Bronze Medal game at the 2020 WCT Tallinn Mixed Doubles International in Tallinn, Estonia. of the 2020 WCT Tallinn Mixed Doubles International in Tallinn, Estonia; Oona Kauste/Aku Kauste (Hyvinkaa, FIN) lost 9-7 to Johanna Heldin/Daniel Magnusson (Uppsala, SWE) in the Bronze Medal game at the 2020 WCT Tallinn Mixed Doubles International in Tallinn, Estonia. Kauste/Kauste lost 9-5 to Emma Sjodin/Niklas Edin (Karlstad, SWE) in the semifinals to drop into the third place game. of the 2020 WCT Tallinn Mixed Doubles International in Tallinn, Estonia; and won 10-6 over Ildiko Szekeres/Gyorgy Nagy (Budapest, HUN) in the quarterfinals. of the 2020 WCT Tallinn Mixed Doubles International in Tallinn, Estonia;
 
Kauste/Kauste finished 4-2 in the 18-team qualifying round. . In their opening game, Kauste/Kauste defeated Karoliine Kaare/Mikk Reinsalu (Tallinn, EST) 7-1, then won 11-6 against Marcella Tammes/Andres Jakobson (Tallinn, EST). Kauste/Kauste went on to lose 6-4 against Jayne Stirling/Fraser Kingan (Stirling, SCO). Kauste/Kauste lost 6-4 to Sjodin/Edin where Kauste/Kauste responded with a 12-8 win over Triin Madisson/Karl Kukner (Tallinn, EST). Kauste/Kauste won 8-5 against Szekeres/Nagy in their final qualifying round match.
 
Kauste/Kauste ranks th overall on the Year-to-Date rankings with points earned so far this season.