Cristiano Ronaldo powered-home a fourth-minute header to give Portugal a 1-0 victory over Morocco, which took them to the Top of Group B.
The result means Morocco are the first team to be eliminated from the World Cup.
Ronaldo's fourth goal at Russia 2018 took the European champions to four points. Iran have three points and Spain have one, ahead of their meeting later on Tonight. Morocco are pointless having also lost 1-0 to Iran and cannot progress to the second round.