The world's current No. 1-ranked men's tennis player, Novak Djokovic, boasts five Grand Slam championships (entering 2013) and a plethora of singles titles.
But beyond the victories, Djokovic has become a fan favorite thanks to his sense of humor and his never-ending fight on the court. There may be more accomplished champions throughout history, but you would be hard-pressed to find an athlete more entertaining than the Djoker.
At age 25, he's just getting started, and will no doubt possess a case full of hardware while securing a significant place in tennis lore by the time his career is finished.
Here we'll look back on Djokovic's greatest and most memorable moments so far.
Every tennis player wants to play their best in the major tournaments, but winning the ATP World Tour Finals brings about tremendous joy as well.
In 2008, when the year-ending tournament was still called the Tennis Masters Cup, Novak Djokovic knocked off Nikolay Davydenko in straight sets in Shanghai to win his first season-ending championship.
He would win again in 2012 in London.
Novak Djokovic was 0-4 against the great Roger Federer (including a loss in the 2006 Davis Cup) coming into the 2007 Rogers Cup.
But after three hard-fought sets, two of which Djokovic won in tiebreakers, the Serbian would celebrate his first win over the tennis legend.
Since that match, the two rivals have each won 12 matches against one another.
After a three-year major title drought, Novak Djokovic finally broke through for a second time in Australia, winning the 2011 Aussie Open behind a dominant straight-set win over Andy Murray in the final.
The win would begin a remarkable year for Nole, who would go on to win three of the year's four Slams in 2011, including Wimbledon and the U.S. Open, both final wins coming against Rafael Nadal.
Before Novak Djokovic began his tear in 2011, he played a key role for Serbia in its first ever Davis Cup title in late 2010.
Novak won both of his singles matches in straight sets, taking down Gilles Simon and Gael Monfils to lead Serbia over France, 3-2 in the Cup final.
Novak Djokovic was on one of the greatest runs in tennis history from late-2010 to mid-2011. After winning two Davis Cup singles match in 2010, he won his first 41 singles matches to begin 2011 before finally having his streak snapped by Roger Federer in the semifinals of the 2011 French Open.
After defeating Richard Gasquet in the fourth round at Roland Garros, Djokovic's streak reached 43 consecutive matches (41-0 to start 2011). He would advance past the quarterfinals via a walkover against Fabio Fognini, finishing one win shy of John McEnroe's 42-0 start to 1984.
Novak Djokovic won not only for himself and his team, but for his country at the 2008 Summer Olympics in Beijing, China.
After losing in the semifinals to Rafael Nadal, he defeated American James Blake in the bronze medal match to win a coveted bronze for Serbia.
The U.S. Open, more than any of the other three Slams, has been cruel to Novak Djokovic over the years. Before 2011 arrived, the Serbian star had lost two finals in Flushing Meadows (2007 and 2010).
But finally, in his greatest year yet, Nole conquered Rafael Nadal and New York, winning his fourth career Grand Slam title, and getting the monkey off his back at the year's final major.
Just months after losing in bitter fashion at the hands of Roger Federer in the 2007 U.S. Open men's final (his first ever Slam final appearance), Novak Djokovic won his first career Grand Slam title in Melbourne, taking down Jo-Wilfried Tsonga in the 2008 Aussie Open final.
Three years would pass before he would win another major tournament.
There is no thrill quite like that of winning Wimbledon.
In July 2011, in the midst of his greatest year (one of greatest by any player in history), Novak Djokovic finally broke through at the All England Club, beating two-time champion Rafael Nadal in four sets to win his third career Grand Slam.
Judging by Nole's reaction, this one was special.
After a dominant run in 2011, Novak Djokovic came into the 2012 Australian Open as the defending champion and the man everyone was gunning for, including Rafael Nadal.
The two met in the men's final on the last day of the tournament, but few could have predicted how the match would unfold. Nadal took the first set, and Djokovic would win the next two before Nadal's fourth set victory sent the match to a fifth and final set.
In the end, after nearly six hours, it was Djokovic emerging as the champion of the longest Grand Slam final in tennis history.
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