Idrissa Gueye described former Everton teammate Andre Gomes as "a warrior" after the Portuguese midfielder suffered a serious ankle injury in the Toffees' 1-1 Premier League draw with Tottenham Hotspur on Sunday.
The 26-year landed awkwardly after getting fouled by Heung-Min Son and collided with Serge Aurier.
Referee Martin Atkinson gave the former a straight red card, although replays showed the collision with Aurier was as much to blame for the incident.
Gueye took to Twitter to offer his well-wishes as the former Barcelona player makes what looks likely to be a long road to recovery.