Players surrounded Joao Paulo Andrade after he fell to the ground unconscious at the stadium in the port city of Setubal, 50 kilometres (30 miles) southeast of Lisbon.

He was stretchered off the pitch and taken to a nearby hospital where he underwent tests and a scan, a hospital spokesman told the RTP station.

The player has regained consciousness and his life is not in danger, he added. The reasons for his collapse have not yet been determined.

Uniao Leiria team doctor Carlos Silva told reporters Andrade may have collapsed because of the intense heat in the city at the time of the match.