Matthew Dellavedova defeated Keita Koyama in the Round of 32 of the M15 Tokyo 4 tournament, winning 7-6, 6-0 on hard courts. Dellavedova served four aces with no double faults, while Koyama had one ace and two double faults. Dellavedova converted 56 percent of his break points and won five service breaks to Koyama's two.
No previous meetings on record.
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