Napoli striker, Victor Osimhen, suffered head trauma after a collision with Cristian Romero in their 4-2 defeat to Atalanta on Sunday, the club has confirmed.
Osimhen was making only his 10th league appearance since teaming up with the Serie A club last summer.
With few minutes left before the end of the game, the Super Eagles forward collided with Romero and fell awkwardly, hitting the back of his head on the turf before losing consciousness.
The Nigeria international was subsequently stretchered off and transported by ambulance to the hospital.
The 22-year-old attacker has now undergone a series of tests and Napoli have revealed the nature of his problems.
“Victor Osimhen, following the injury with head trauma suffered in the final minutes of Atalanta-Napoli, underwent tests with negative results,” read a statement from the club website .
“The player will remain in Bergamo until tomorrow under the clinical observation of the blue health manager Raffaele Canonico.”
Manchester United manager, Ole Gunnar Solskjaer, has refused to concede defeat in the Premier League title race, following their 3-1 win over Newcastle on Sunday.
The result saw the Red Devils reclaim second spot from Leicester City and stay within 10 points of leaders Manchester City.