Tennis champion Novak Djokovic is poised to sign with IMG after dropping CAA Sports, which has represented him for four years. Sources tell us that Djokovic has been in serious talks with IMG, which has negotiated huge endorsement deals for fellow players Rafael Nadal and Roger Federer. Djokovic is also being independently advised by billionaire Ron Burkle, but sources said, “Ron advises him on a friendly basis, while the situation on representation is between CAA and IMG.” Djokovic was recently quoted by SportsBusiness Journal’s Daniel Kaplan as saying, “I have had a contract with [CAA] I think for four years . . . I tried to work it out, and it was successful, but I think I needed to move on.” His rep didn’t get back to us.