The 76ers will tell you that Joel Embiid’s recovery from left knee surgery has been better than expected. Coach Brett Brown was asked if the center would be cleared to play back-to-back games on Wednesday and Thursday nights. The Sixers entertain the Washington Wizards on Wednesday at home before facing the Boston Celtics one night later at T.D. Garden. “I don’t really know,” Brown said of Embiid’s playing both nights. “We don’t know yet.” The coach said he hadn’t looked that far ahead, nor had he asked the medical staff the question. His focus Monday was on facing the Cleveland Cavaliers at the Wells Fargo Center. But as of a week ago, Embiid was not cleared to play on consecutive nights. “It does come up in coaches’ meetings,” Brown said. “But not to the point where I forced an answer. We are kicking that around.”