Super Eagles forward, Samuel Kalu, collapsed on Sunday during a Ligue 1 away game between his club, Bordeaux, and Marseille.
The 23-year-old fell to the ground in the sixth minute as Dimitri Payet prepared to take a free-kick amid searing temperatures at the Stade Velodrome in France.
Players from both teams rushed to the Nigeria international and called for medical attention.
Kalu was able to get up and walk off the pitch with the help of his team-mates, holding an ice pack to his head.
He resumed playing moments later, but was substituted in the 14th minute and the match finished in a 2-2 draw.
The cause of the incident is unclear, but this is the second time in two years that the Nigerian will collapse on the pitch.
The incident brought back memories of Christian Eriksen’s collapse at Euro 2020 in June, when the Denmark midfielder suffered a cardiac arrest.
Eriksen’s life was saved when CPR was administered to him on the pitch and his heart was re-started with a defibrillator, before he was taken to hospital, where he recovered after undergoing heart surgery.