Cory Christensen/John Shuster (Duluth, MN) run at the 2018 Twin Ports Mixed Doubles Classic came to an end in the semifinals with a 8-7 loss to Vicky Persinger/Christopher Plys (Fairbanks, AK). of the 2018 Twin Ports Mixed Doubles Classic in Duluth, Minnesota, United States; Christensen/Shuster advanced through the quarterfinals with a 7-3 win over Taylor Anderson/Derrick McLean (Blaine, MN).
 
Christensen/Shuster finished 4-0 in the 30-team qualifying round. . In their opening game, Christensen/Shuster defeated Clare Moores/Lance Wheeler (Denver, CO) 9-1, then won 10-6 against Kaye Hufman/Colin Hufman (Fairbanks, AK) and 10-4 against Sara Olson/Mike Olson (Duluth, MN). Christensen/Shuster won 8-3 against Jamie Sinclair/Sean Beighton (Blaine, MN) in their final qualifying round match.
 
. For week 15 of the event schedule, Christensen/Shuster did not improve upon their best events, remaining at th place on the World Ranking Standings with total points. Christensen/Shuster ranks th overall on the Year-to-Date rankings with points earned so far this season.