In the beginning of this professional career, Djokovic mainly played in Futures and Challenger tournaments, winning three of each type of tournament.

He participated in the 2006 Hopman Cup with fellow Serbian player Ana Ivanovic where the pairing narrowly missed the final.

He continued his great run in 2006 by shooting up the rankings. In May 2006, various reports appeared in the British media about Novak's mother Dijana reportedly approaching Britain's Lawn Tennis Association about her son joining British tennis ranks and the possibility of their entire 5-person family moving from Serbia to live in Britain.[9] All the rumours didn't affect Djokovic's play, however. He started 2006 ranked 78th, but with an excellent run to the quarterfinals at Roland Garros and a fourth round appearance at Wimbledon, he found himself in the top 40. Just three weeks after Wimbledon he won his maiden title in Amersfoort without losing a set defeating Nicolás Massú in the final. Djokovic won his second career title in Metz and with this victory moved into the top 20 for the first time in his career.

Djokovic began a successful year by winning in Adelaide, defeating Australian Chris Guccione in the final. At the 2007 Australian Open, he reached the fourth round, where he lost to eventual champion Roger Federer in straight sets.

In 2007, his performances in the Masters Series events at Indian Wells and Miami, where he was runner-up and champion respectively, pushed him well into the world's top ten. In those tournaments, which were his first and second Masters finals, he defeated fellow rising star Andy Murray in the semi finals without dropping a set in either match. He lost the Indian Wells final to Rafael Nadal, but avenged this defeat by beating Nadal in the Miami event, before defeating the resurgent Guillermo Cañas in the final (6-3, 6-2, 6-4). He later played in the prestigious Monte Carlo Open, only to be defeated by David Ferrer in his third round match in straight sets. He reached the quarterfinals of both Rome and Hamburg Masters, but lost to Carlos Moyà and Nadal, respectively. At the tournament in Estoril, ?okovi? defeated Frenchman Richard Gasquet 7-6, 0-6, 6-1, in the final.

At the French Open he reached his first Grand Slam semifinal ever, where he lost to eventual champion Rafael Nadal.

During the 2007 Wimbledon Championships, he won an epic match against Marcos Baghdatis in the quarter finals. The match ended 7-6 (4), 7-6 (9), 6-7 (3), 4-6, 7-5 and lasted 5 hours, just 5 minutes shy of the longest singles match in a single day in Wimbledon history. In his semi-final match, he was forced to retire against Rafael Nadal due to a back injury and foot problem.

He garnered further success in the Masters Series, winning the 2007 Canada Masters. In the final he defeated top seeded Roger Federer 7-6 (2), 2-6, 7-6 (2). In reaching the championship, he achieved the remarkable feat of defeating the World Nos. 1, 2 and 3 (Roger Federer, Rafael Nadal and Andy Roddick, respectively) on three consecutive days. This is the first time a player has accomplished this since Boris Becker in 1994. Moreover, ?okovi? became only the 2nd person, after Tomáš Berdych, to have defeated both Federer and Nadal since they became the dominant #1 and #2 players in the world. His successful performance made Björn Borg state that Djokovic "is definitely a contender to win a Grand Slam."[10] However, Djokovic's appearance the following week at the Cincinnati Masters, resulted disappointingly with a straight-set loss to Carlos Moyà in the 2nd round.

He nevertheless came to the 2007 U.S. Open with a lot of confidence and expectation and reached the final where he lost to top-seeded Federer 7-6 (4), 7-6 (2), 6-4. On his way to the final, ?okovi? won an epic 5-set 6-7 (4), 7-6 (5), 5-7, 7-5, 7-6 (2) second round match against Radek Št?pánek after nearly 5 hours of play.

Djokovic returned after a minor injury to Vienna, to beat Stanislas Wawrinka in the final 6-4, 6-0 and take his 5th title of the year. The win enables ?okovi? to gain closer on Rafael Nadal in the ATP Tour Rankings. ?okovi?'s next tournament was the prestigous Madrid Masters, where he lost to David Nalbandian 6-4, 7-6 (4) in the semifinals, an improvement on the previous years finish. At the 2007 Paris Masters, he was upset by Frenchman Fabrice Santoro.

Djokovic., then assured of finishing third, went to Shanghai for the 2007 Tennis Masters Cup, being the first player to arrive. ?okovi? was also the first player to exit the tournmanent, losing his first two matches of the round-robin format to David Ferrer 6-4, 6-4, Richard Gasquet 6-4, 6-2, and to to Nadal 6-4, 6-4. This means that Djokovic.has lost six straight sets.

--Wikipedia