(Reuters) - Novak Djokovic sauntered past Spaniard Feliciano Lopez to reach the quarter-finals of the Shanghai Masters on Thursday but Andy Murray had to claw past big-serving American John Isner after losing a first-set tiebreaker.
Dominant world number one Djokovic, twice a champion in Shanghai, eased to a 6-2 6-3 victory to stay on track for a ninth title of the year having picked up his eighth last week in Beijing where he dropped only 18 games in five matches.
Murray, playing his first tournament since helping Britain into the Davis Cup final last month, had to produce some of his best tennis in the face 22 Isner aces.