Real Madrid legend, Iker Casillas has suffered a heart attack, according to reports from Portugal.
Portuguese radio, RTP, said was rushed to a hospital in Porto and is believed to be in a stable condition.
Casillas, 37, who suffered the attack at the FC Porto training ground, is now expected to be ruled out for the rest of the season.
Casillas made his debut for Real Madrid as a teenager in 1999 and remained at the Bernabeu for the next 16 years.
He has won the Champions League three times – with Real in 2000, 2002 and 2014. He also won five La Liga titles and two Copa del Reys.
In 2010, he became the first Spanish captain to lift the World Cup, after they beat Holland 1-0 in the final in South Africa.
He moved to Porto in 2015 and helped them win the Portuguese league title last season. He remains their No 1 goalkeeper and played both legs of the Champions League quarter final defeat to Liverpool last month.