Chicago Bulls forward Luol Deng was taken back to the emergency room on Friday due to a viral flu, according to ESPNChicago.com. The Chicago forward is doubtful for Game 7 against the Brooklyn Nets.

Deng tweeted that he was taken to the emergency room Wednesday, and his symptoms indicated he might have meningitis, requiring him to undergo a spinal tap. He tweeted: "the weakest I've ever felt" after the Bulls Game 6 loss.

"As a result of the spinal tap I suffered the worst headache I've ever experienced and been the weakest I've ever felt," Deng tweeted. "Yesterday I was unable to walk or even get out of bed. I made it to the UC and was sent home. (Friday) morning my symptoms worsened."

Deng later tweeted: "Now I'm back in the ER where I may have to spend the night... I want my teammates and Bulls fans to know I would NEVER miss a game bc of flu.

"If I'm medically cleared I will fly to NY to be with my team and try to win game 7."

The Bulls have experienced multiple other injuries over the course of the opening-round of the NBA Playoffs. Kirk Hinrich experienced a bruised left calf and is improving, but remains a game-time decision for Game 7.

Guard Nate Robinson and forward Taj Gibson also suffered from the flu but were able to play in Game 6. Robinson, who played 42 minutes and scored 18 points, vomited on the bench during a break in play. Thibodeau said Friday that Robinson and Gibson are feeling better.

The Bulls have also been without superstar point guard Derrick Rose all season, despite being cleared. Rose suffered knee injury during the first round of last year's playoffs against the Indiana Pacers and has been skeptical about returning to action prematurely.