He left the pitch moments later and was replaced by Kylian Mbappe at half-time. "I don't have good news", said PSG manager Thomas Tuchel.
The Uruguay worldwide was one of few PSG stars to start the match, as Tuchel kept the likes of Leandro Paredes and Kylian Mbappe in reserve ahead of the last-16 first leg at Old Trafford. But they will still feel the absence of Neymar and Cavani - if the latter can't play.
Cavani broke the deadlock with a penalty for his 17th goal in 16 league games this season after Thomas Meunier had been fouled in the area. We must wait. I didn't see him or talk to the doctor.
His absence against United would be a big blow for the French champions, with Brazilian star Neymar already sidelined for both legs of the tie by a foot injury. "Without Ney [Neymar], maybe without Marco, maybe without Edi [Cavani], now we need a plan D". It's very hard if we play with our best team, it's a big challenge.More news: Drake, Kendrick Lamar, And Childish Gambino Declined Grammys Performances
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At least the win allowed PSG - whose shirts carried the players' names in Mandarin in a nod to the Chinese New Year - to get back on track after last week's 2-1 loss at Lyon, their first Ligue 1 defeat this season. "If we are missing lots of key players, it's an even bigger challenge, but we will be ready on Tuesday, I think".
The France global is now likely to start as a lone striker at Old Trafford, supported by Julian Draxler and Angel Di Maria.
Cavani and Moussa Diaby came close for the home side in the first half-hour, either side of Eric Maxim Choupo-Moting being denied by a terrific save from Bordeaux 'keeper Benoit Costil.
The Uruguayan netted a penalty to put PSG 1-0 up against Bordeaux before appearing to tweak his thigh after the spot-kick.