Australian Bernard Tomic fired nine aces past Alexandr Dolgopolov in ousting the fourth-seeded Ukrainian 6-1 7-5 on Thursday to reach the ATP Memphis Open quarter-finals.
The 22-year-old dispatched 23rd-ranked Dolgopolov in only 66 minutes to book a date in the final eight against American Donald Young, who defeated compatriot Denis Kudla 7-5 6-3.
Tomic, who beat Dutchman Igor Sijsling in the first round, did not face a break point in ripping through the opening set and rescued seven of eight break-points against him in the second.
Tomic, ranked 49th, had won their most recent match-up in last year's Sydney quarter-finals and in a five-set battle in the third round of the 2012 Australian Open.
Kevin Anderson ended the campaign of Australian Sam Groth, with the No.2 seed from South Africa winning 6-3 6-2.
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