Madison Keys' husband and coach, Bjorn Fratangelo, recently likened Aryna Sabalenka to Serena Williams, Roger Federer, Rafael Nadal and Novak Djokovic.
Madison Keys' coach Bjorn Fratangelo likened the prospect of facing Aryna Sabalenka to staring down Novak Djokovic, Serena Williams and Roger Federer at their best.
Madison Keys' husband and coach Bjorn Fratangelo has said that his on-court presence has helped Keys focus on her tennis, and blot out any extraneous distractions.