Coco Gauff has has fired one of her coaches on the eve of the U.S. Open and brought aboard the serve doctor who helped No.

After all, despite being viewed as one of the favourites to challenge for the women’s crown, she made the bold decision to ...

Darren Cahill, who is the coach of ATP world number one Jannik Sinner, has weighed in on Gauff’s hiring of MacMillan. Darren ...