But Sam Allardyce says the player was full of cold, and he only found out at half-time during the match with Spurs when he arrived in the dressing room.
Off-Colour N'Zogbia Wanted To Play On!
Sam Allardyce: "Charles was feeling unwell - he wasn't breathing correctly.
"He was trying not to tell us, but we finally found out. He didn't want to come off - he wanted to stay on.
"We made the right decision. It's hard enough playing at this pace anyway, let alone if you're feeling unwell. Physically, you're not at the level you can be.
"But he's OK. He's back in training and in the squad for Reading."