When the American is on form, his tennis looks like a flurry of winners and good times. But he's more interested in running the numbers.
Jannik Sinner and Ben Shelton went head-to-head on Friday evening in the second Australian Open men's singles semi-final.
Ben Shelton has reached his first Australian Open semifinal by defeating Lorenzo Sonego 6-4, 7-5, 4-6, 7-6 in an entertaining ...