Lionel Messi's bid to win the World Cup got off to a nightmare start as he missed a penalty and his Argentina side were surprisingly held by debutants Iceland.

Messi was looking to match the impact his old rival Cristiano Ronaldo has made on the tournament - a sensational hat-trick against Spain on Friday night.

But instead of being the hero, Messi was the villain as his second-half spot-kick was easily saved by Hannes Halldorsson with the score at 1-1.

The draw was no less than Iceland, who are the smallest nation ever to play in a World Cup finals, deserved.

Their disciplined, defensive tactics frustrated an Argentina side who enjoyed the majority of possession and they also carried a threat going forward from the start, with Birkir Bjarnason scuffing a glorious early chance.

After surviving that scare, the thousands of Argentina fans who packed out the Spartak Stadium were dancing in the Moscow sunshine when Sergio Aguero put them ahead with a superb strike after 19 minutes.

But Jorge Sampaoli's side have a soft centre and their lead lasted only four minutes and 15 seconds, as Alfred Finnbogason equalised with his country's first goal at a World Cup finals.

Finnbogason had made a hash of a header seconds earlier but Argentina failed to clear and Willy Caballero could only palm Hordur Magnusson's shot into the path of the striker, who gleefully turned it home.

Messi's missed penalty was Argentina's only clear-cut chance in the second half, although Cristian Pavon's bouncing cross drew a fine late save from Halldorsson.

Messi could not provide the inspiration Argentina craved

All eyes were on Messi from the moment he walked into the Spartak Stadium, with the Argentina fans roaring their approval whenever his image flashed up on the big screen before the game, but he could not provide the inspiration they craved.

It was not for a lack of effort, or a shortage of attempts on goal, but the image of the Barcelona star that summed up his day was one of dejection, when he was left staring at the ground at the final whistle, with his hands on his knees.

He had been left to wander by Iceland, who did not try to man-mark him, but there were only flitting moments when he threatened to work his magic, with his best moment a first-half shot palmed away by Halldorsson.

Messi did provide the floated cross that led to Argentina's penalty after Maximiliano Meza was fouled by Magnusson, but he will want to forget what happened next.

Good save or not by Halldorsson, you do not expect Messi to miss from the spot on this stage.

He cannot afford to be as wasteful again if Argentina are to go deep into this tournament, especially with their fragile-looking defence.

Messi turns 31 later this month and is at his fourth World Cup, possibly his last chance for global glory to go with his spectacular achievements at club level with Barcelona.

If he is to lift Argentina to similar heights, and win his first international title, he will need some help.

Against Iceland, he got it from Aguero - who put Argentina ahead with a masterful finish.

The Manchester City striker brilliantly controlled Marcos Rojo's driven cross, then span away from his marker before burying his shot high in the net - his side's only quality moment in front of goal.