Karoliine Kaare/Harri Lill (Tallinn, EST) qualified for the 2021 WCT Tallinn Masters Mixed Doubles playoffs, dropping their quarterfinals match 8-6 against Nkeiruka Ezekh/Alexey Stukalskiy (Moscow, RCF). of the 2021 WCT Tallinn Masters Mixed Doubles in Tallinn, Estonia;
 
Kaare/Lill finished 2-2 in the 0-team qualifying round. . In their opening game, Kaare/Lill defeated Triin Madisson/Karl Kukner (Tallinn, EST) 7-5, then won 9-3 against Asta Vaicekonyte/Nedas Ivanauskas (Vilnius, LTU). Kaare/Lill went on to lose 6-2 against Anastasia Moskaleva/Alexander Eremin (Dmitrov, RCF). Kaare/Lill lost 6-5 to Ildiko Szekeres/Gyorgy Nagy (Budapest, HUN) in their final qualifying round match.
 
Kaare/Lill ranks th overall on the Year-to-Date rankings with points earned so far this season.