Ayla Aksu vs Sofia Costoulas Result: Costoulas Wins 7-5, 6-2

Sofia Costoulas defeated Ayla Aksu 7-5, 6-2 to advance through the first round of the 2025-26 Livesport Prague Open, settling the Ayla Aksu vs Sofia Costoulas prediction market with a dominant straight-sets performance on the Prague hard courts. Costoulas, ranked No. 155, came through qualifying and arrived in the main draw with confidence already built against this same opponent. The Belgian hit 33 winners, served with precision, and gave Aksu very few opportunities to establish rhythm in either set.

The Polymarket prediction market closed at 100 percent in favor of Sofia Costoulas after the result was confirmed. The market had opened at an even 50 percent split, but traders pushed the price sharply toward Costoulas during the match, with the 24-hour swing reaching nearly 50 percent. The total volume of $464,413 made this one of the more active WTA first-round markets on the platform, and the outcome matched the direction traders moved the price.

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What Happened: Ayla Aksu vs Sofia Costoulas

Sofia Costoulas and Ayla Aksu took to Court 1 in Prague on July 20, 2026, in a first-round WTA 250 clash at the Livesport Prague Open. Costoulas entered as a qualifier, having already beaten Aksu 7-5, 6-2 in the third qualifying round just one day earlier. The repeat performance in the main draw was equally convincing. Costoulas broke Aksu late in a competitive first set to seal it 7-5, then dominated the second set 6-2 to wrap up the match.

Costoulas finished with 33 winners against just 59 points for Aksu across the full match, winning 75 points of her own. Costoulas struck 3 aces, committed just 1 double fault, and won 72 percent of her first-serve points throughout the contest. Aksu, ranked No. 266, struggled to match the Belgian’s aggression from the baseline and could not sustain pressure when defending break points. The scoreline in both the qualifying round and the main draw was identical: 7-5, 6-2.

Costoulas had a clear scouting advantage heading into the main draw encounter. Two matches against the same opponent in 48 hours gave the Belgian a detailed read on Aksu’s tendencies. Costoulas exploited Aksu’s second-serve vulnerabilities and stayed aggressive on returns throughout, giving the Turk no comfortable service games in the second set.

How the Market Called It

The Polymarket market on this Livesport Prague Open first-round match opened at an exact 50-50 split, reflecting genuine pre-match uncertainty about two players separated by fewer than 100 ranking spots. Costoulas entered as a mild bookmaker favorite at roughly 56 percent implied probability in external tennis markets. The Polymarket price started moving sharply on July 20 and closed at 100 percent for Costoulas once the result was final.

The market correctly favored Sofia Costoulas, though the final 100 percent reading reflects post-resolution certainty rather than pre-match conviction. The more meaningful signal came from the speed and volume of the price movement during the match: $464,373 of the total $464,413 volume traded in the final 24-hour window. Traders responded quickly and accurately to the match as it unfolded. That volume behind a correct call makes this a clean example of a market that tracked the live result in real time.

What Is Next for Sofia Costoulas

Sofia Costoulas advances to the second round of the 2025-26 Livesport Prague Open, having now won six consecutive sets against Ayla Aksu across two matches in the same week. Costoulas faces the next challenger in the WTA 250 draw in Prague, continuing a productive Czech hard-court swing. The Belgian has shown sharp form, and her qualifying run plus main-draw dominance gives her a match-hardened edge heading into the next round.

Traders looking to follow Sofia Costoulas through the rest of the Prague Open can find live prediction markets on Lines.com. The Livesport Prague Open hub on Lines.com carries all active markets for the tournament, including second-round matchups as they are confirmed. Related WTA 250 markets are also live on the platform for traders tracking the full draw. Note: only live, unresolved markets are linked below.

LINES RESOLUTION VERDICT

SOFIA COSTOULAS

Sofia Costoulas beat Ayla Aksu 7-5, 6-2 in a commanding straight-sets result, matching the market’s closing direction and leaving no doubt about the better player on the Prague hard courts.