Emma Raducanu (back), Elise Mertens (ankle) WD from ASB Classic

(Photo credit: Mike Frey-Imagn Images)
Former U.S. Open champion Emma Raducanu and second-seeded Elise Mertens withdrew from the ASB Classic on Tuesday in Auckland, New Zealand.

Raducanu, who is dealing with a balky back, is no stranger to injuries, having dealt with issues involving her wrists, ankles and back over the last few years.

The 22-year-old British player was seeded sixth in the tournament and set to square o