American Sam Querrey hit 21 aces Friday and edged No. 21-seeded Milos Raonic in the second round at Wimbledon, 6-7 (3), 7-6 (7), 7-6 (8), 6-4.

The match was suspended in the third set Thursday because of darkness.

Querrey served up to 136 mph and was broken only once. A former top-20 player, he's ranked 64th and mounting a comeback after undergoing right elbow surgery a year ago.

Querrey's into the third round at a Grand Slam tournament for the first time since the 2010 U.S. Open.