Carrie Robertson/Alex Robertson (Stratford, ON) qualified for the 2021 Palmerston Mixed Doubles Spiel playoffs, dropping their quarterfinals match 9-2 against Kaitlin Jewer/Robert Currie (Toronto, ON). of the 2021 Palmerston Mixed Doubles Spiel in Palmerston, Ontario;
 
Robertson/Robertson finished 2-1 in the 16-team qualifying round. . In their opening game, Robertson/Robertson defeated Riley Sandham/Brendan Craig (Guelph, ON) 6-4, then went on to lose 7-3 against Kimberly Tuck/Wayne Tuck Jr. (Strathroy, ON). Robertson/Robertson responded with a 6-5 win over Cynthia Smith/DJ Johnson (Denver, CO) in their final qualifying round match.
 
Robertson/Robertson earned 9.129 world rankings points for their Top 5 finish in the Palmerston Mixed Doubles Spiel, remaining in 778th place overall on the World Ranking Standings with a net gain of 9.128 after improving upon their best so far this season. Robertson/Robertson ranks 101st overall on the Year-to-Date rankings with 9.128 points earned so far this season.