Formerly the world’s No. 1 professional tennis player and six-time major singles winner, Boris Becker is the latest stellar name to sign with partypoker as a brand ambassador. The online poker site has been busy recruiting ambassadors and sponsored professionals of late as it looks to expand its reach into countries around the world. This year alone, partypoker has signed Patrick Leonard, Roberto Romanello, Sam Trickett, Natalia Breviglieri, Jackie Glazier, Beata Jambrik and Joao Simao as ambassadors or sponsored pros, joining the legendary Mike Sexton, Tony Dunst and four-time world champion boxer Carl Froch on partypoker’s books. Becker, who was…