Major Upset:: Anna Kalinskaya (No. 14 seed) defeated No. 2 seed Madison Keys 6-2, 6-4, marking her first Top 10 win in 10 months.
Another Upset:: Sofia Kenin ousted former champion and No. 5 seed Daria Kasatkina 6-3, 7-6(7).
Top Seed Progresses:: No. 1 seed Jessica Pegula continued her strong run, defeating Ajla Tomljanovic 6-3, 6-2.
Zheng Survives:: No. 3 seed Zheng Qinwen battled past Elise Mertens in three sets (6-3, 3-6, 6-3) to extend her clay-court winning streak.
Collins Defends:: Defending champion Danielle Collins won her eighth straight match in Charleston, beating Jelena Ostapenko 7-5, 6-3.
Alexandrova Advances:: No. 9 seed Ekaterina Alexandrova secured a dominant 6-1, 6-2 win over No. 6 seed Diana Shnaider.
Why this matters: These results shake up the draw, paving the way for potentially unexpected semifinalists alongside the top seeds. Kalinskaya's win, in particular, could signal a return to form after a challenging start to her 2025 season.
Thursday's action at the Charleston Open delivered exciting tennis and reshaped the path to the title. Anna Kalinskaya's straight-sets win over Madison Keys was the headline result. Capitalizing on 40 unforced errors from Keys, Kalinskaya played aggressively and consistently, stating she 'needed this for my confidence' after missing the Australian Open due to illness and struggling for wins early in the season. She advances to face Sofia Kenin, who produced her own upset against Daria Kasatkina in the late match.
Top seed Jessica Pegula faced little resistance, cruising past Ajla Tomljanovic and setting up a quarterfinal clash with defending champion Danielle Collins. Pegula holds a commanding 5-0 head-to-head record against Collins, but Collins is riding an eight-match win streak in Charleston after dispatching Jelena Ostapenko.
Olympic champion Zheng Qinwen was tested by Elise Mertens but ultimately prevailed in three sets, showcasing her resilience on clay. Her reward is a quarterfinal matchup against Ekaterina Alexandrova, who snapped a four-match losing streak with her commanding victory over Diana Shnaider.
Who caused the biggest upset in the Charleston Open Round of 16?
Anna Kalinskaya (seeded 14th) scored the most significant upset by defeating the No. 2 seed, Madison Keys, in straight sets.
Which top seeds advanced to the quarterfinals?
No. 1 seed Jessica Pegula and No. 3 seed Zheng Qinwen both advanced, although Zheng required three sets to overcome Elise Mertens.
Who is the defending champion?
Danielle Collins is the defending champion and advanced to the quarterfinals by defeating Jelena Ostapenko.
Upsets happen: Even top seeds aren't immune to early exits, making tournaments unpredictable and exciting.
Form matters: Kalinskaya's win could boost her confidence significantly after a tough start to the year.
Key Matchups Ahead: The quarterfinals feature intriguing clashes like Pegula vs. defending champion Collins and the upset winners Kalinskaya vs. Kenin.
The quarterfinals promise more thrilling tennis! Which matchup are you most looking forward to? Do you think an underdog can go all the way?
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