LAKE BUENA VISTA, Fla. — Philadelphia 76ers star Joel Embiid left Sunday’s 124-121 loss to the Portland Trail Blazers in the first quarter because of a left ankle injury and did not return. He returned to the bench in the second half, and Sixers coach Brett Brown said after the game he didn’t have a further update on Embiid’s status, besides agreeing with the observation that Embiid looked happy and engaged with the game in the second half from his seat in the back row of Philadelphia’s bench. “I’m going to learn more, physically,” Brown said. “I don’t know enough to comment on it. But I do agree … every time I looked behind the bench, he was into it.” Embiid appeared to hit his left ankle on the stanchion under the basket midway through the first quarter. After a media timeout with 6:18 to go in the quarter, Embiid slowly walked over to Philadelphia’s bench and sat in the assistant coach’s seat immediately next to the scorers table.