After the tournament Dimitrov announced that he was ending his junior career and focusing on improving his ATP ranking. His first title came on clay at a futures tournament in Barcelona.
His first ATP level match was at the Ordina Open where he lost to Igor Andreev in straight sets.
After his junior US Open title he won back to back futures tournaments in Madrid on hard court and rose 300 places to career high ranking of 477.
The achievement attracted enough attention to earn him a wildcard into the Mutua Madrileña Madrid Open qualifying draw where he lost to then No. After being granted another wildcard to the Davidoff Swiss Indoors qualifying draw and defeated No.
His success continued at the US Open, which he won on 7 September, defeating American qualifier Devin Britton in two sets.
On his way to the title he also defeated top seed Tsung-hua Yang of Taiwan in the semifinals. In 2008, Dimitrov began frequent participation in men's events.
23 Tomáš Berdych, earning his first ATP main draw win. 8 Gilles Simon in the first round, despite serving for the match at ninth game of the third set.
The victory saw him join former junior champions Roger Federer and Stefan Edberg and guaranteed him a wildcard entry into the 2009 Wimbledon men's draw.Dimitrov began dating Maria Sharapova in late 2012.He and Sharapova only confirmed their relationship after the 2013 Madrid Open where the Bulgarian managed his first win against a world No. At the beginning of 2016, he started dating Nicole Scherzinger, 13 years his senior, in a discreet relationship.He then received a wildcard at the If Stockholm Open but lost in the first round to Jarkko Nieminen.Dimitrov started the season with a quarterfinal finish at a challenger event of Internationaux de Nouvelle-Calédonie.He won his first round match against Tobias Kamke but in the second round lost to the number 1 seed of the qualification Thomaz Bellucci.Dimitrov won his first doubles challenger title at the ATP Challenger Trophy with Teymuraz Gabashvili beating Jan Minář and Lukáš Rosol.122 Jiří Vaněk in three sets in the first round for his first ATP level win, before losing to Julian Reister.In 2009, he was granted a wildcard to the main draw of the ABN AMRO World Tennis Tournament and scored an upset over then world No. He was granted a wildcard to the main draw of the Open 13, but lost to world No.He then attempted to qualify for the Australian Open, but lost in the first round to Robert Kendrick in three sets.He bounced back a week later by qualifying at the Honolulu Challenger, but lost to Donald Young in the second round.