With a single goal, Luis Suarez settled the fate of four teams in the group stage of the World Cup.

The controversial striker, who was making his 100th appearance in his national team's light blue, scored Wednesday to give Uruguay a 1-0 victory over Saudi Arabia in Rostov-on-Don, Russia, and a spot in the round of 16.

The result also put host Russia into the next round while eliminating both Saudi Arabia and Egypt. Uruguay and Russia have won both their matches and meet to decide the Group A champion Monday.

Suarez, who was kicked out of the last World Cup for biting an opponent during a match, knocked in a corner kick from Carlos Sanchez in the 23rd minute for his 52nd goal for his country over those 100 matches.

"We are more than proud because we've reached the knockout stage at three successive World Cups. It's a beautiful moment and we want to enjoy it," Suarez said. "We still haven't hit our stride so we need to tweak some things."

Besides scoring, Suarez led his team with a hard-working performance. He fell back to defend and raced forward alongside Edinson Cavani on the counterattack.

"I don't want to hand out empty praise, but Suarez is a crucial player for us. And he has that enormous capacity to score goals," Uruguay coach Oscar Tabarez said. "He lives under enormous pressure, but he lives with it. He takes that pressure on."

Portugal 1, Morocco 0: Cristiano Ronaldo headed in a fourth-minute cross in Moscow for his 85th international goal, the most for any European player in almost 150 years of international soccer.

"It was beautiful for me," Ronaldo said.

The goal moved the 33-year-old ahead of Ferenc Puskas, another Real Madrid great who scored his last goal for Hungary in 1956. Ronaldo is alone in second place worldwide behind Ali Daei's 109 goals for Iran.

Ronaldo's four goals top the individual scoring chart at this year's World Cup, and he has scored every goal for Portugal, including a hat trick in Friday's 3-3 draw with rival Spain.

Most of the best play after the goal came from Morocco, but the North Africans now have no chance of advancing from the group stage after a second consecutive 1-0 loss.

Spain 1, Iran 0: Diego Costa scored on a second-half deflection to lead Spain to a victory in Kazan.

Facing a very compact Iranian team that came out to defend, Spain had to be patient. Costa broke the deadlock in the 54th minute after being set up by Andres Iniesta.

The powerful striker turned in the area and took a shot but the ball deflected off Ramin Rezeian before bouncing back onto Costa's knee and into the net for Costa's third goal in two matches.

First place in Group B could be decided by goal difference. Iran will need to beat Portugal on Monday to advance.