The Australian Open has shaken up the ATP rankings, giving Spain's Rafael Nadal, who lost in the final, a tighter hold on the No. 1 ranking.

Nadal came out of Melbourne with a bigger lead over Serbian world No. 2 Novak Djokovic, who was the defending champion and was knocked out of the tournament in the quarterfinals.

Switzerland's Stanislas Wawrinka, who won his first major title by beating Nadal 6-3, 6-2, 3-6, 6-3 in Sunday's Australian Open final, climbed to the No. 3 spot.

Nadal has a 3,710-point lead over Djokovic, whom he led by just 870 points two weeks ago.

The 27-year-old Nadal, a 13-time Grand Slam champion, has 14,330 points, while Djokovic has 10,620 points and Wawrinka, who jumped five spots in the rankings, has 5,710 points.

The Spaniard, who won his lone Australian Open title in 2009 with a five-set win over Switzerland's Roger Federer, sustained a back injury during Sunday's final that affected his mobility.

Nadal was seeking to become the first man in the Open Era - which began in the late 1960s - to win each of tennis' four biggest titles at least twice.

Argentina's Juan Martin del Potro, who made an early exit from the Aussie Open, climbed one spot to No. 4.

The players hurt the most by their performances in Australia were Spain's David Ferrer, who is now 5th; Britain's Andy Murray, who dropped to No. 6; and Federer, who is now No. 8.

Each of these players dropped two spots in the rankings.

Spain's Roberto Bautista Agut, one of the Australian Open's big surprises and the man who knocked off Del Potro, climbed 10 spots in the rankings to No. 52. 

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