Australian Open champion Madison Keys needed six match points as she clawed out a 6-2, 6-7 (8/10), 6-4 victory over Elise Mertens on Monday to reach the fourth round at Indian Wells.In other early matches, Argentina's Francisco Cerundolo beat Botic van de Zandschulp 6-3, 6-4, ending the run of the Dutch lucky loser who toppled 24-time Grand Slam champion Novak Djokovic in the second round. bb/rcw