Madison Keys recently spoke about the nature of her coaching relationship with her husband, Bjorn Fratangelo ... much more than what you do with a racquet," Fratangelo wrote on Instagram on ...

The American ended her longtime association with Wilson, choosing the, for the lack of a better word, “safer” racket. The brain behind the change is husband-and-coach Bjorn Fratangelo.

After the two players hugged and Keys ran over to celebrate her first Grand Slam win with her coach and husband, Bjorn Fratangelo, Sabalenka smashed her racquet and then sat on her player’s ...

After shaking hands at the net, Sabalenka returned to her bench before destroying the racket in her hand ... which includes husband Bjorn Fratangelo, who agreed to become her coach last year.

Among them was Bjorn Fratangelo, a former American tennis player ... The American picked up her first racket at the age of four and made her professional debut at just 14 years of age.