Embattled Australian tennis star Bernard Tomic has reportedly been dumped by global management company IMG.

News emerged on Tuesday that the agency had terminated its lucrative contract with the 21-year-old before it was due to expire.

Tomic first signed with IMG as a 12-year-old, spawning marketing deals potentially worth millions of dollars with the likes of Nike, Yonex, Optus and Qantas.

While the one-time Wimbledon quarter-finalist has fallen outside the top 100, it’s understood Tomic’s off-court behaviour was behind the split, according to the US-based Sports Business Journal and tennisworldusa.org.

IMG’s Australian-based director of tennis, Brian Cooney, has not responded to AAP’s calls for comment.

The revelation follows Tomic’s round-one victory at the Claro Open Colombia in Bogota on Tuesday (AEST).

The Australian wildcard beat Uzbekistsan’s Farrukh Dustov 6-3 6-3 for his first win on hard courts since January, when he reached the final of the Sydney International.

Tomic, who was sidelined for two months after the Australian Open to have double hip surgery, fired 10 aces against the 140th-ranked Dustov and converted three of his four break-point chances.

He next faces either 2013 finalist Alejandro Falla or Japan’s Tatsuma Ito.