Boris Becker applauds Jannik Sinner's serve improvements - Game-changing shot

Boris Becker has highlighted one key factor behind Jannik Sinner's remarkable rise in the previous two years. The youngest Wimbledon champion praised the current winner at the All England Club and his improved serve. Jannik has transformed his initial shot from a decent shot into a true match-winning weapon. After the painful US Open final defeat to Carlos Alcaraz in four sets, the Italian honestly opened up and gathered his team. He and Simone Vagnozzi spent weeks adjusting his i