Nina Roth/Kroy Nernberger (Madison, WI) run at the 2018 Twin Ports Mixed Doubles Classic came to an end in the semifinals with a 7-3 loss to Tabitha Peterson/Joe Polo (Bemidji, MN). of the 2018 Twin Ports Mixed Doubles Classic in Duluth, Minnesota, United States; Roth/Nernberger advanced through the quarterfinals with a 8-4 win over Sarah Anderson/Korey Dropkin (Minneapolis, MN). of the 2018 Twin Ports Mixed Doubles Classic in Duluth, Minnesota, United States;
 
Roth/Nernberger finished 2-2 in the 30-team qualifying round. . In their opening game, Roth/Nernberger defeated Lexi Lanigan/Jonathan Harstad (Chaska, MN) 7-2, then won 8-1 against Maggie Payette/Jack Payette (Duluth, MN). Roth/Nernberger went on to lose 7-5 against Christine McMakin/Riley Fenson (Bemidji, MN). Roth/Nernberger lost 7-6 to Peterson/Polo in their final qualifying round match.
 
. For week 15 of the event schedule, Roth/Nernberger did not improve upon their best events, remaining at th place on the World Ranking Standings with total points. Roth/Nernberger ranks th overall on the Year-to-Date rankings with points earned so far this season.