Switzerland’s Stanislas Wawrinka has won his first Grand Slam title with victory over an injury-hit Rafael Nadal in the finals of the Australian Open.

Wawrinka’s victory places him on number three in the world ranking, moving up from eight seven.

He withstood a fightback from the world number one, who was struggling with a back problem, to come through 6-3 6-2 3-6 6-3.

The 28-year-old becomes only the second Swiss man to win a Grand Slam singles title after 17-time champion Roger Federer.

And he is the first man outside the ‘big four’ of Nadal, Federer, Novak Djokovic and Andy Murray to win a Grand Slam since Juan Martin Del Potro at the 2009 US Open.

The Spaniard, 27, showed great spirit to hit back once again from a break down in the fourth, but a forehand winner gave Wawrinka the decisive break at 5-3 and he served out the biggest win of his life with a love game.

“I still think that I’m dreaming,” said Wawrinka. “It’s a strange feeling. I saw so many finals. I always try to watch the finals of Grand Slams because that’s where the best players are playing.

“Before today, for me it wasn’t a dream. I never expected to play a final. I never expected to win a Grand Slam. And right now I just did it,” he said.