Novak Djokovic broke through for his first grand-slam triumph with a dramatic four-set victory over unseeded Frenchman Jo-Wilfried Tsonga at the Australian Open on Sunday.

The 20-year-old third seed became the first Serb to win a tennis grand-slam, coming from behind to register a 4-6, 6-4, 6-3, 7-6 victory over Andy Murray's victor in three hours six minutes.

Djokovic's victory was the first grand-slam final since the 2005 Australian Open not won by Roger Federer or Rafael Nadal, with the top-ranked pair dominating the game with the last 11 majors between them. Djokovic and Tsonga rocked the established order by dumping Federer and Nadal out in the semi-finals to set up a decider unimaginable at the start of the tournament.

The Serb went on to claim his first major title in his 13th grand-slam after losing to Federer in last year's US Open final and also reaching the semi-finals at the French Open and Wimbledon. The victory stretched his winning streak to 11 matches, beating his previous best unbeaten run.

Tsonga, bidding to become France's first grand-slam winner in 25 years, started well and took the only set off Djokovic in the tournament but could not go with him in the remaining sets. Tsonga, who blasted Nadal out of the tournament in straight sets, could not reproduce his blistering semi-final form, but he still played well with his winners outnumbering his errors.

Djokovic appeared to tweak his left hamstring in stretching for a volley at 0-30 on Tsonga's service in the fourth game of the fourth set and sought treatment from the trainer at the next changeover. But he held on to take the championship in the fourth-set tiebreaker.

Djokovic will remain at No 3 in rankings behind Federer and Nadal after his win but Tsonga is projected to climb to 18 from 38.

Both players exchanged service breaks in the opening two games but the young Serb came under pressure on serve towards the end of the opening set. Tsonga pulled off a terrific forehand winner off a Djokovic smash to bring up set point and then a desperate lob volley just floated inside the baseline to break the Serb and take the set in 49 minutes of tense tennis.

Djokovic picked up his game in the second set, grabbing the crucial break in the seventh when Tsonga's forehand was wide. He served out to level the final with three set points in the tenth.

Djokovic looked in command of the match, breaking Tsonga in he third and ninth games to hit the front in the third set. He needed seven set points to get his second break and the third set after the Frenchman fought a desperate rearguard battle. Tsonga fought back and had a break point on Djokovic in the 11th game of the fourth set but the young Serb held serve. Djokovic dominated the fourth set tiebreaker to take the championship on the first of his four match points.