Ivory Latta scored 27 points and Washington held Tulsa without a field goal in overtime as the Mystics won 95-90 on Monday.
Trailing by two with 23.3 seconds left in regulation, Glory Johnson hit two free throws to tie it at 88. In overtime the Mystics outscored Tulsa 7-2. Latta's two free throws with 16.2 seconds left in OT sealed the win.
Matee Ajavon added 19 points, Crystal Langhorne 16 and Kia Vaughn 10 for the Mystics (1-0).
Johnson had 20 points and 14 rebounds to lead Tulsa while Liz Cambage added 21 points and 10 boards.
The Shock (0-2) was led by Roneeka Hodges' 22 points. Hodges was 8-of-11 from the field. Her six 3-pointers tied her career high.