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.
"Wish you a fast recovery Andre Gomes. You are a warrior," the 30-year Senegalese tweeted.
Gomes and Gueye played together at Everton last season, making a combined 64 competitive appearances, involving themselves in four goals.
Gueye moved to Paris-Saint-Germain this summer and has featured nine times in all competitions, scoring once.
After sitting out three games with a groin injury, the combative midfielder was back in PGS's 2-1 loss at Dijon over the weekend.
Despite the setback, the French capital club remain seven points clear of Angers at the top of the Ligue 1 standings.
