Read the full story hereBBC wrote:
Arsenal captain Cesc Fabregas is due to have a scan on Thursday amid fears he broke his leg in Wednesday's 2-2 Champions League draw with Barcelona.
"I fear the worst, which is that I have broken something," said the midfielder, who limped off after his late penalty.
"It is the fibula. I think I put my leg between [Carles] Puyol's when I was fouled, and kicked it."
William Gallas' season may also be over after he suffered a calf injury, and Andrey Arshavin also faces a spell out.
While defender Gallas was stretchered off just before half-time and seems likely to miss the rest of Arsenal's campaign, Arshavin told his website that he expects to be back from his calf problem in two to three weeks.
Gunners manager Arsene Wenger lamented the loss of both players, admitting that he had taken a risk on Gallas, who had missed the last six weeks through injury.
"Gallas has a calf strain and will be out for a while now," said Wenger. "I took a gamble that didn't pay off. Yes I regret that now. Arshavin has also done his calf."
Fabregas, who was a doubt before the quarter-final first leg with severe bruising to his knee and leg, was only declared fit to play after the final warm-up.
Oh Christ, that's not good news, even though I'm an obvious Chelsea fan it's not nice when you see someone suffer an injury like this, regardless of talent or who they play for. Hope it's not as serious as he thinks it it.