Yuliia Starodubtseva defeated Janice Tjen on Tuesday to advance to the quarterfinals of the Monterrey Open [2], [3].

The victory marks a significant turnaround for Starodubtseva, who entered the tournament in Mexico struggling to find form. By overcoming a higher-ranked opponent, she has shifted her momentum within the Abierto GNP Seguros event.

Starodubtseva entered the match as the underdog. According to MSN Sports, she was listed at +115 odds [2], while Tjen was the favorite with -149 odds [2]. The ranking gap was similarly wide, with Tjen holding the No. 35 spot and Starodubtseva ranked No. 74 [2].

Despite the statistical disadvantage, Starodubtseva secured the win. Reuters said she had entered the week on a six-match losing streak [3]. The victory in the Round of 16 effectively ended that slump and propelled her deeper into the tournament bracket.

"Yuliia Starodubtseva, who entered the week on a six-match losing streak, is through to the quarterfinals of the Abierto GNP Seguros event in Monterrey, Mexico," Reuters said [3].

The match took place on Aug. 25 in Monterrey, Mexico [2]. Tjen's loss prevents her from advancing further in the 2026 WTA tournament schedule [1], [2].

Yuliia Starodubtseva, who entered the week on a six-match losing streak, is through to the quarterfinals

This result highlights the volatility of the WTA tour, where ranking and betting odds often fail to predict outcomes for players emerging from a slump. Starodubtseva's win is a critical psychological break from a six-match losing streak, potentially altering her trajectory for the remainder of the 2026 season.