Arsenal keeper David Ospina has collapsed during Napoli's Serie A clash with Udinese.
The loanee was taken off on a stretcher before later regaining consciousness and was immediately taken to a nearby hospital.
He was replaced by substitute keeper Alex Meret - who has been battling with Ospina for the No.1 shirt at San Paolo Stadium.
The original incident occurred early on in the match when he dived out to meet a low cross and collided with Udinese's Argentinean striker Ignacio Pussetto in the seventh minute.
Ospina then conceded two goals before falling to the ground in the 44th minute - when he was forced off.
Napoli beat Udinese with the score 4-2.