Superior court craft proved decisive for Australian Open champion Angelique Kerber on Monday as she motored past Japanese pocket rocket Misaki Doi 6-3 6-1 in a full-blooded fourth-round match on Wimbledon's Court Two.

German fourth seed Kerber, who reached the semi-finals at the All England Club in 2012, risked being overpowered early in the first set as her 5-foot-3 (1.59 metre) opponent bludgeoned forehand winners to both sides of the court.

But Kerber, who shocked world number one Serena Williams to win her maiden grand slam title in Melbourne in January, gradually found her range on her groundstrokes while 49th-ranked Doi's radar began to slip.

In a match full of mesmerising rallies, Kerber broke twice in the first set, winning it on her third set point, before cruising through the second as Doi's challenge fizzled out.

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