Tommy Haas has done it again!
If 2012 saw Haas upset the legendary Roger Federer, 2013 saw him climb one notch higher.
Novak Djokovic suffered a straight-sets defeat to Haas in the Sony Open, showing that the veteran has not lost his touch.
Though his ranking is quite low for a player of his calibre, Haas has shown glimpses of his game that can disturb the top players.
Over the last year, Haas has pulled off several upsets (considering his ranking) along with surprising losses to lower-ranked players.
If he can get his game together on most days, there is no doubt that Haas can be in the top 10 of the ATP Rankings.
Injuries have taken their toll on his career, but Haas is determined to make up for lost time.
Haas is probably the one player whom Roger Federer can call as his compatriot from a bygone era, and that may be the reason both are good friends off the court as well.
Let us now look at Tommy Haas' conquests over the past 12 months.
John Isner fell to Tommy Haas in the San Jose tournament held in February of this year.
Isner was ranked 16th at the time, and Haas vanquished his opponent easily.
Mardy Fish was ranked 15th when he met Tommy Haas in July of last year in Washington.
Fish was also relegated to the sidelines by Haas in a match that he was expected to win.
Marin Cilic was ranked 15th in the world in July last year when he met Tommy Haas in the Hamburg semifinal.
Cilic suffered a shock loss that saw him defeated 6-0 in the second set on the clay surface.
Gilles Simon has not been able to master the puzzle that is Tommy Haas
Simon suffered two losses against Haas last year (in Canada and Hamburg) and must be wishing that he does not come in the way of the veteran again this year.
Nicolas Almagro was the casualty of Tommy Haas in the Indian Wells tournament earlier this year.
Though it was not his favourite surface, Almagro has consistently performed in most tournaments outside the Grand Slam.
It was not to be at the Indian Wells, where Haas had the upper hand.
Janko Tipsarevic was ranked ninth when he met Tommy Haas in Shanghai Masters in the round of 16.
Unfortunately for Tipsarevic, he could not proceed further in the tournament, thanks to a wonderful exhibition of tennis by Haas.
Tomas Berdych has made great strides in his career and achieved a highest ranking of sixth on the ATP Tour.
Berdych was ranked seventh when Haas defeated him at the Halle grass tournament.
Haas would go on to win the tournament with his consistent play.
Frenchman Jo-Wilfried Tsonga was an early casualty of Tommy Haas in April last year at Munich.
This win probably changed Haas' approach and made him believe that he can still trouble the others on the Tour.
This was followed by the other victories culminating in the vanquish of Novak Djokovic.
Roger Federer and Tommy Haas are good friends on the tour.
It was a surprise to all Federer's fans when Haas defeated him in June last year at the Halle tournament, which Haas went on to win.
The final was very interesting, especially with two men in their 30s playing a wonderful game.
Federer has been troubled by Haas often in his career (head-to-head record shows 10-3 in Federer's favour), but the victory at Halle came up as a big surprise.
Novak Djokovic became the biggest casualty of Tommy Haas in the fourth round of the ongoing Sony Open.
Handing Djokovic his first defeat this year (before the finals), Haas made everyone realise that age is just a number!
Will Haas take this victory as a morale-booster to notch up higher in the rankings?
He definitely has the ability, as one can see by the rivals he has overpowered.
If he can put it to good use, we might just have another upcoming contender for the Top Four.