Six-time Australian Open champion Roger Federer came from behind to reach the quarter-finals in Melbourne with victory over Marton Fucsovics.
The Swiss, 38, beat the Hungarian 4-6 6-1 6-2 6-2 and will play American Tennys Sandgren in the last eight.
After losing the first set, Federer breezed through the second and third, winning seven successive games.
He twice broke Fucsovics in the fourth set before serving out the win on his third match point.
Federer battled for more than four hours to see off John Millman in the third round and he looked unsure of the wind conditions on Rod Laver Arena.
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