Deng, who played nearly 48 minutes against the Raptors, finished with 19 points, 7 assists and 6 rebounds and knocked down the game-winning jumper with 3.3 seconds left.
"I tweaked my hamstring," said Deng, who is day-to-day. "I tweaked it early in the first quarter. I was going to come out, I came out earlier than I normally do. And the plan was to come back. But I just felt like I could play through it. Coach kept asking me, the training staff kept asking me how it felt."
"Hopefully it won't be too bad," he said. "Just one of those nagging injuries. I just hope it's not serious."
Deng said he felt the hamstring pull but decided to play through the pain. He wore ice packs and kept his feet in an ice bucket in the locker room after the game.
The Bulls play the Boston Celtics on Friday night at TD Garden.