Katie Cottrill/Shawn Cottrill (Belgrave, ON) run at the 2018 Ilderton Mixed Doubles Spiel came to an end in the semifinals with a 8-1 loss to Sheri Greenman/Michael Zuliani (Newmarket, ON). of the 2018 Ilderton Mixed Doubles Spiel in Ilderton, Ontario, Canada; Cottrill/Cottrill advanced through the quarterfinals with a 9-8 win over Sara Gatchell/Jake Higgs (Strathroy, ON). of the 2018 Ilderton Mixed Doubles Spiel in Ilderton, Ontario, Canada;
 
Cottrill/Cottrill finished 2-1 in the 16-team qualifying round. . In their opening game, Cottrill/Cottrill lost 9-6 to Stephanie Thompson/Matt Lowe (Unionville, ON), then responded with a 6-2 win over Amie Shackleton/Derek Shackleton (Toronto, ON). Cottrill/Cottrill won 10-2 against Erin Daniel/Kelly Schuh (Windsor, ON) in their final qualifying round match.
 
. For week 15 of the event schedule, Cottrill/Cottrill did not improve upon their best events, remaining at th place on the World Ranking Standings with total points. Cottrill/Cottrill ranks th overall on the Year-to-Date rankings with points earned so far this season.