Substitute Hwang Hee-chan scored the winner in injury time to rescue South Korea from the brink of World Cup elimination in a thrilling 2-1 victory over already-qualified Portugal on Friday.

The Wolverhampton Wanderers' forward slipped in the winner in the 91st minute at Education City Stadium in Qatar to spark delirium and tears among the Korean fans.

Talisman Son Heung-min, who set up the winner, collapsed to the floor and lay on his back on the turf at the final whistle. He had tears in his eyes.

The Korean players then stood in a huddle on the pitch watching the Ghana v Uruguay match on a mobile phone as they awaited their place in the last 16 to be confirmed.

A much-changed Portugal had taken a fifth-minute lead through Ricardo Horta but the Koreans, who had to win to stand any chance of staying alive, hit back in the 27th minute through Kim Young-gwon.

Portugal skipper Cristiano Ronaldo played a part in the Korean equaliser, turning his back on a corner and the ball hitting him to set up Kim.

South Korea and their skipper Son, in a mask after recent surgery, needed to score again but they failed to really trouble Portugal until Son set up Hwang in injury time after a fine run.

Before a ball was even kicked a roar went up at Education City Stadium every time Ronaldo's face popped up on the big screen, even during the national anthems. There were some jeers too and chants of "Messi, Messi".

South Korea coach Paulo Bento, the former Portuguese international, had to watch from the stands after he was sent off following the final whistle of the Koreans' 3-2 defeat to Ghana.

He saw his men fall behind after just five minutes when defender Pepe played the ball down the right to Manchester United full-back Diogo Dalot.

Dalot easily evaded a weak Korean challenge and pulled the ball back from the byline for winger Horta to fire unmarked into the back of the net in front of a 44,000 crowd.