Alexander Zverev loses first match as No. 1; Novak Djokovic also out in Paris
Alexander Zverev's tenure as the No. 1 player in men's tennis started with a 7-6 (5), 6-2 defeat to Lorenzo Musetti, while Novak Djokovic saw his dwindling hopes of making the ATP Finals with a loss to qualifier Rinky Hijikata.