Katie Douglas had 19 points and Tamika Catchings added 14 for the Fever (4-3), who have won four of their last five. Zellous, acquired from Tulsa on May 27, shot 6-for-10 and finished two points shy of her career high.
Janel McCarville hit a three-pointer with 13.1 seconds left to pull the Liberty to 76-73, but Indiana's Ebony Hoffman made two free throws and grabbed a rebound off Pondexter's miss in the final seconds to seal the victory.
Indiana led 35-32 at halftime.
Dream 86, Mystics 79
Iziane Castro Marques added 19 points for the Dream (7-2), who rallied from a 10-point deficit in the second half and snapped a two-game losing streak. McCoughtry scored 10 points in the fourth quarter.
Crystal Langhorne scored 23 points to lead the Mystics (4-4).