Sam Querrey’s rehabilitation from his recent elbow surgery is going well, but there is still no timetable set for his return, his representative told TENNIS.com. Querrey injured his elbow at the tournament in Queens and was forced to pull out of Wimbledon. His doubles partner, John Isner, said at Wimbledon that the Southern Californian could be out for two months, which would put his appearance at the U.S. Open at risk. Querrey's ranking has dropped to No. 48.