Jenny Perret/Martin Rios (Glarus, SUI) won 6-3 over Alice Cobelli/Amos Mosaner (Cembra-Lisignago , ITA) in the Final of the International Mixed Doubles St. Gallen, held October 2 - 4, 2020 in St. Gallen, Switzerland. To advance to the championship game, Perret/Rios won 8-3 over Therese Vestman/Robin Ahlberg (Stockholm, SWE) in the semifinals
 
Perret/Rios finished 8-1 in the 17-team qualifying round. . In their opening game, Perret/Rios defeated Laura Engler/Tom Winkelhausen (St. Gallen, SUI) 8-5, then won 9-6 against Adela Walczak/Andrzej Augustyniak (Lodz, POL) and 7-5 against Marie Turmann/Harri Lill (Tallinn, EST). Perret/Rios won 8-3 against Daniela Rupp/Kevin Wunderlin (Aarau, SUI), then won 7-3 against Johanna Heldin/Daniel Magnusson (Uppsala, SWE) and 8-1 against Dorottya Palancsa/Zsolt Kiss (Budapest, HUN). Perret/Rios won 9-2 against Hannah Augustin/Martin Reichel (Kitzbuehel, AUT). Perret/Rios went on to lose 8-3 against Cobelli/Mosaner. Perret/Rios responded with a 7-3 win over Vestman/Ahlberg in their final qualifying round match.
 
Perret/Rios ranks th overall on the Year-to-Date rankings with points earned so far this season.