At The O2 Arena
Surface: Hardcourt indoor
LONDON (AP) _ Results Wednesday from World Tour Finals Singles at The O2 Arena (seedings in parentheses):
Alexander Zverev, Germany, def. Diego Schwartzman, Argentina, 6-3, 4-6, 6-3.
Daniil Medvedev, Russia, def. Novak Djokovic, Serbia, 6-3, 6-3.
Marcel Granollers, Spain, and Horacio Zeballos, Argentina, def. Bruno Soares, Brazil, and Mate Pavic, Croatia, 7-6 (4), 6-7 (4), 10-8.
Jurgen Melzer, Austria, and Edouard Roger-Vasselin, France, def. Michael Venus, New Zealand, and John Peers, Australia, 2-6, 7-6 (4), 12-10.