Nitto ATP Finals Group B preview: Djokovic, Federer, Thiem, Berrettini
While Group A at the Nitto ATP Finals may be more interesting, Group B is the toughest. Novak Djokovic and Roger Federer are the main reasons, but don’t overlook the fact that Dominic Thiem has won a surprising 15 hard-court matches since the U.S. Open. […]