Kei Nishikori dismissed David Ferrer in straight sets to book an Australian Open quarter-final with defending champion Stanislas Wawrinka.
Fifth seed Kei Nishikori was largely untroubled as he got past ninth seed David Ferrer in straight sets at the Australian Open on Monday.
Nishikori advanced to the quarter-finals at Melbourne Park - where he will play defending champion Stanislas Wawrinka - for the second time in his career.
The US Open finalist was the aggressor, tallying 43 winners to Ferrer's 14, and only losing serve once as he chalked up a 6-3 6-3 6-3 victory.
Nishikori won all four of the pair's 2014 meetings - although the last of which, at the ATP World Tour Finals in London, was the only one not to feature a tie-break.
While all four clashes went the distance, the London match finished 6-1 in the third set in Nishikori's favour and, by the way their fourth round match started on Monday, it was as if the Japanese had finally found the key to unlock his opponent.
Either way, the match was certainly on Nishikori's racquet - as he swatted 16 winners to Ferrer's four to take the first set.
But the world number five did not have to do much to earn his first break - two Ferrer double faults helping him move 2-1 up.
Nishikori had three comfortable holds to follow - all to 15 - before wrapping up the opener with a backhand winner on his first set point.
The second set started the same way as the first - Ferrer struggling his way to a service hold - with the Spaniard fending off three break points.
But for all his assiduous defensive work, Ferrer could not pose a threat to Nishikori unless the latter stumbled himself - and that was not forthcoming.
When Ferrer got himself into a 0-40 hole in the eighth game, he could not escape - he put a forehand comfortably long on the second break point and Nishikori served out the next game for a two-set lead.
Any hope of a Ferrer rearguard was lost in the first game of the third set, when he committed three unforced errors to go from 30-0 up to break-point down - and Nishikori benefitted from a popped-up net-cord to whip a forehand winner to break.
A netted Ferrer forehand on match point saw Nishikori advance in little over two hours, in what was a one-sided affair.