Mia Pohankova is an 18-year-old Slovak tennis player who arrived in Tokyo ranked No. 144 and carrying the distinction of being the 2025 Wimbledon girls’ singles champion. On October 29, 2026, she defeated Naomi Osaka 6-3, 7-5 in the round of 16 at the Toray Pan Pacific Open. It was the biggest win of her career at that point. One day later, she went further, beating Alycia Parks 7-6, 7-6 in the quarterfinals to reach her first tour-level semifinal.
That sequence matters because the information changed quickly. The WTA’s initial report named Parks as Pohankova’s next opponent; the later Tennis.com match record lists that contest as completed. The sources available for this article do not identify Pohankova’s semifinal opponent, so readers should check the official draw before making plans.

Who is Mia Pohankova?
Pohankova was born on October 21, 2008, according to the player information displayed by Tennis.com, and represents Slovakia. She turned 18 during the month of the Tokyo tournament. She also entered the event with a significant junior credential: the 2025 Wimbledon girls’ singles title.
Her 2026 professional progress was already visible before the Osaka upset. According to the WTA’s match report, Pohankova won an ITF W75 title early in the season, finished runner-up at an ITF W100 event in April and reached consecutive WTA 125 semifinals in September. She also earned two wins at the WTA 1000 event in Wuhan before arriving in Tokyo.
Taken together, those results describe a gradual move from junior success into stronger professional competition. That progression provides more useful context than treating one victory over a prominent opponent as an isolated breakthrough.

How she defeated Osaka
Osaka took an early 2-0 lead in the first set, but Pohankova responded and won it 6-3. The second set stayed close. The Slovak saved break points in two service games, then broke in the 12th game to close the match 7-5. The contest lasted 1 hour and 35 minutes.
The match statistics credit Pohankova with six aces and only one double fault. She won 74% of her first-serve points and saved four of the five break points she faced. Osaka converted only one of five break opportunities.
The 6-3, 7-5 result eliminated a former world No. 1 and former Tokyo champion. Osaka was the seventh seed and ranked No. 18 in the list displayed by the official WTA rankings page. Pohankova, meanwhile, was making her first main-draw appearance at a WTA 500 tournament.

Why it was her career-best win
Calling it the “biggest win” does not mean one match determines an athlete’s future. It describes the result’s objective scale at the time: the No. 144 player defeated No. 18, a former top-ranked player, in front of Osaka’s home crowd in Japan.
The win sent Pohankova into her fourth tour-level quarterfinal, matching her best previous stage on the WTA Tour. It was also her first quarterfinal at WTA 500 level. Her ranking movement provides another measure of progress: the WTA reported that she was No. 659 at the same point in 2025 and had reached a career-high No. 144 by Tokyo.
A future ranking should not be projected from a single victory, however. Points and positions depend on the calendar and official updates. Readers looking for the latest number should use the WTA singles rankings and check which ranking date is selected.
Pohankova also beat Parks
Her Tokyo run did not end with Osaka. In the October 30 quarterfinal, Pohankova played American Alycia Parks, listed at No. 65 on the match page. Tennis.com records a straight-sets win for the Slovak, with both sets ending 7-6.
The statistics indicate a match shaped heavily by serve. Pohankova won 72% of her first-serve points, saved four of six break points and converted three of four opportunities. Parks recorded nine double faults. The victory put Pohankova into the first tour-level semifinal of her career, taking her beyond the stage she had matched one round earlier.
This update also avoids a frequent problem in tournament coverage: describing a match as upcoming after it has already finished. At publication time, the supplied sources did not provide a confirmed semifinal opponent or start time.
Where to verify her next match
The safest way to follow the tournament is to check the official draw and order of play through the tournament and WTA channels. Opponents and times can change or remain unconfirmed until other matches conclude, so they should not be inferred from an earlier report.
For rankings, use the WTA page and note the list date. For completed matches, verify that the record is labeled “Completed” and read the set-by-set score. Broadcast availability varies by territory, and the available sources do not support a current United States viewing recommendation.
The responsible conclusion is specific: Pohankova turned her first WTA 500 main draw into her first tour-level semifinal. That is a verifiable career milestone, not a forecast of what she will accomplish next.
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