Andy Murray has claimed that his body has finally recovered from his back surgery last September.
Andy Murray beat Sam Querrey in four sets as Great Britain reached the Davis Cup quarter-finals for the first time since 1986.
Hosts Japan sailed into the Davis Cup quarter-finals for the first time with a 3-1 victory against injury-plagued Canada on Sunday.
Andy Murray slipped out of the top four while Stan Wawrinka is the new world number three as the new rankings were released.
Round-up: Grigor Dimitrov upset 11th seed Milos Raonic 6-3 3-6 6-4 7-6(10) in an 156-minute Australian Open thriller.
David Ferrer smashed a racket after losing his serve but reached the fourth round of the Australian Open with a 6-2 7-6(5) 6-2 win over Jeremy Chardy.
Order of play on the main showcourts at the Australian Open on Saturday.
Round-up: Fifth seed Juan Martin Del Potro was on the end of a huge shock when losing 4-6 6-3 5-7 6-4 7-5 to Roberto Bautista Agut.
Round-up: The Australian Open ended early for John Isner after the American number one retired from his match against Martin Klizan.
ATP World Tour Finals
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