Australian Open 2019: Kei Nishikori triumphs but Ivo Karlovic departs with his head held high

Karlovic, who will be 40 next month and breaks age-related records with almost every match he plays, came close to pulling off a remarkable victory before Nishikori won 6-3, 7-6, 5-7, 5-7, 7-6 after more than three and three-quarter hours