After winning 18 consecutive matches against San Diego the Washington Kasltes fell 22-18 on Monday night at the Smith Center.
After losing only three sets in their first six matches, Washington dropped four of five to the Aviators.
Through half of the Mylan World TeamTennis season, the 6-1 Kastles and 5-2 Aviators remain on course to meet for the King Trophy on July 27.
San Diego Aviators 22, Washington Kastles 18
Men's Singles: Somdev Devvarman (Aviators) def. Bobby Reynolds (Kastles) 5-4
Women's Doubles: Daniela Hantuchova/Kveta Peschke (Aviators) def. Martina Hingis/Anastasia Rodionova (Kastles) 5-3
Mixed Doubles: Leander Paes/Martina Hingis (Kastles) def. Raven Klaasen/Kveta Peschke (Aviators) 5-2
Women's Singles: Daniela Hantuchova (Aviators) def. Martina Hingis (Kastles) 5-2
Men's Doubles: Somdev Devvarman/Raven Klaasen (Aviators) def. Leander Paes/Bobby Reynolds (Kastles) 5-4