Kei Nishikori has won eight of his nine five-set matches at the Australian Open, only ever losing to Roger Federer when going the distance.
Kei Nishikori came from two sets down to triumph 4-6 4-6 (4-7) 7-5 6-2 6-3 over Thiago Monteiro at the Australian Open.
Taylor Fritz and Coco Gauff earned the United States a first win at the United Cup, while there were also victories for Italy and Germany.
Elena Rybakina helped Kazakhstan to a comeback win over Spain in their United Cup opener, while China triumphed against Brazil.
No results available
No matches available.
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