Manchester United's Marcos Rojo could face retrospective action by the FA after appearing to stamp on Eden Hazard.
The incident happened during the second half of Chelsea's 1-0 FA Cup quarter-final victory over United at Stamford Bridge.
United were already chasing the game after N'Golo Kante scored following Ander Herrera's sending off for receiving two yellow cards.
Hazard was under pressure from Rojo when he went to ground under a challenge by the United defender.