MELBOURNE, Australia — Canadian tennis players Denis Shapovalov and Gabriel Diallo battled through challenging first-round matches to advance at the Australian Open on Tuesday. Shapovalov, ranked 56th, defeated Spain’s Roberto Bautista Agut (53rd) 3-6, 6-4, 6-4, 7-6 (8) in a match that lasted more than three hours on Court 5 at Melbourne Park. The 25-year-old […]