Atletico Madrid striker Alvaro Morata has paid tribute to former Real Madrid teammate Iker Casillas.

The Spanish veteran has played a key role in Porto's run to the Champions League quarter-final.

"I didn't know he'd renewed, I'm sure he's held them up for a lot of money," Morata intimated.

"I wish he could come back to the national team.

"He's a legend and a great person."