Earlier, ESPN reported that Maradona had collapsed after the final whistle and was taken away from the stadium.
"I want to tell everyone that I am fine, that I am not, neither was I interned. In the halftime of the game against Nigeria, my neck hurt a lot and I suffered a decompensation. I was checked by a doctor and he recommended me to go home before the second half, but I wanted to stay because we were risking it all. How could I leave? I send a kiss to everyone, thanks for the support!" Maradona posted on Instagram.
"Our doctors approached him [Maradona] to measure his pulse. He said that he didn't need any medical assistance. The information about [Maradona's] hospitalization is false," an ambulance worker said.
Argentina beat Nigeria 2-1 in their final Group D match and move to the knockout stage, where they will face Group C winners France in Kazan on Saturday.