Fourth-seeded Czech Kristyna Pliskova overcame Taiwan's Chang Kai-chen in straight sets to advance to the second round of the Japan Women's Open on Monday.
Pliskova, who took a wild card and came to the $250,000 hardcourt tournament at the last minute, reeled off 14 aces in hot and windy conditions at Ariake Tennis Forest Park en route to a 7-5, 7-5 victory.
"I was a bit nervous because it was a bit windy today," said Pliskova, who holds the record for the most aces (31) in a match on the WTA tour. "My serve was working today so it helped.