Tuesday, January 15, 2013 Updated: January 16, 11:41 AM ET
Novak Djokovic socks Ryan Harrison
MELBOURNE, Australia -- Novak Djokovic was all but perfect in his second-round match Wednesday against Ryan Harrison, beating the 20-year-old American 6-1, 6-2, 6-3 to stay on track for his third consecutive Australian Open title and the fourth of his career.
Djokovic, a loser in the U.S. Open final last year to Andy Murray, looks like he wants to atone for that defeat.
He was relentless in beating the overmatched Harrison, winning the first set in just 20 minutes and the match in 1½ hours while making just 16 unforced errors.
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No. 20 Sam Querrey advanced when fellow American Brian Baker retired in the second set with a right knee injury and next plays No. 15 Stanislas Wawrinka.
Baker, who returned to the tour last year after missing almost six seasons with a variety of injuries, won a first-set tiebreaker and was level at 1-1 on serve in the second. He was later pushed from Court 6 in a wheelchair.
Tournament organizers said that Baker had a torn meniscus and is expected to be out about four months.
"Yeah, he's the last person that deserves anything like that with his five or six surgeries already," Querrey said.