Napoli goalkeeper David Ospina was hospitalized after he played on despite a head injury during a Serie A match on Sunday and then collapsed.
Ospina injured his head in a collision with Udinese forward Ignacio Pussetto during the opening minutes of the game but insisted he was fine to continue.
However, the Colombia international fell to the ground around 40 minutes later, seemingly unconscious.
Ospina was conscious when he was taken off the field and transported to the nearby San Paolo hospital.
Napoli says a CT scan was clear but the 30-year-old Ospina will be transferred shortly to the Pineta Grande clinic and kept under observation for 24 hours.
Napoli had wasted a 2-0 lead in the match but went on to beat Udinese 4-2.
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