Chelsea fullback Paulo Ferreira collapsed at Lisbon airport just hours after watching his side's victory over Fenerbahce.
The Portugal international , 29, was signing autographs for Rangers fans travelling to their UEFA Cup tie with Sporting when he slumped unconscious.
One fan told The Sun: "He came round after a couple of minutes and said he hadn't eaten anything since the day before.
"I think he was quite embarrassed and didn't want any fuss."