Laurent Koscielny could be out of Arsenal's Champions League opener at PSG.

The Sun says the centre-back has a severely swollen cheekbone and could be replaced for tomorrow's glamour tie by 20-year-old Rob Holding — just over a year after he made his debut for Bolton.

Koscielny scored a spectacular overhead equaliser in the Gunners' 2-1 win over Southampton on Saturday.

But he was laid flat-out in added time — controversially requiring several minutes of treatment after Arsenal were awarded a penalty which saw Santi Cazorla win the game.

Gunners boss Arsene Wenger is already missing club captain Per Mertesacker until January.