Guadalajara & Sao Paulo predictions, September 17, 2026: Bucsa vs. Bejlek, Samsonova vs. Kostyuk

Thursday's Guadalajara quarterfinal pits Cristina Bucsa against Sara Bejlek on hard. Sara Bejlek has won 7 of the last 10. Cristina Bucsa is 6-4 across recent matches.

Sara Bejlek is clearly higher-rated on hard — our number puts Bejlek around 63%. The edge belongs to Bejlek — real, but not the kind you take for granted at this level.

A spot in the next round is at stake on Thursday, when Liudmila Samsonova goes up against Marta Kostyuk in the Guadalajara quarterfinal. Marta Kostyuk is 7-3 across recent matches. Liudmila Samsonova is 6-4 across recent matches.

Marta Kostyuk is clearly higher-rated on hard — our number puts Kostyuk around 72%. The edge belongs to Kostyuk — real, but not the kind you take for granted at this level.

A spot in the next round is at stake on Thursday, when Iva Jovic goes up against Magdalena Frech in the Guadalajara quarterfinal. Iva Jovic comes in at 6 wins from the last ten. Magdalena Frech comes in at 6 wins from the last ten.

There's a wide gap in our ratings on hard, and our number follows from it. Jovic should have enough here, though Frech has the tools to make the scoreboard uncomfortable.

A spot in the next round is at stake on Thursday, when Alina Charaeva goes up against Elina Avanesyan in the Sao Paulo round of 16. Elina Avanesyan is 6-4 across recent matches. Alina Charaeva has dropped 2 straight and sits at 5-5 over the last ten.

Elina Avanesyan simply rates much higher on hard, and our number follows from it. This one is close to a coin flip, and the lean toward Avanesyan is exactly that — a lean.

Eva Lys and Nadia Podoroska meet in the round of 16 at Sao Paulo on Thursday. Eva Lys has won 4 of the last 10. Nadia Podoroska has won 4 of the last 10.

Neither the serve numbers nor the ratings separate these two by much, which is why our number stays close to even. The edge belongs to Lys — real, but not the kind you take for granted at this level.

Thursday's Guadalajara round of 16 pits Kayla Day against Liudmila Samsonova on hard. Liudmila Samsonova is searching for form, having lost 2 in a row (6 of the last 10). Kayla Day is 3-7 across recent matches.

Hold strength tells the story — 69.2% versus 63.3% on first-serve points in Samsonova's favor. Anything other than a Samsonova win would rank among the bigger surprises of the week.

A spot in the next round is at stake on Thursday, when Jazmin Ortenzi goes up against Paula Badosa in the Sao Paulo round of 16. Paula Badosa comes in at 8 wins from the last ten. Jazmin Ortenzi is 5-5 across recent matches.

The serve is where this match separates: Badosa has been winning 65% of first-serve points to Ortenzi's 58.4%, and on hard that gap compounds fast. If Badosa plays anywhere close to a normal level, this ends in relatively comfortable fashion.

A spot in the next round is at stake on Thursday, when Solana Sierra goes up against Suzan Lamens in the Sao Paulo round of 16. Solana Sierra limps in on a 3-match losing skid, just 4 wins in 10. Suzan Lamens limps in on a 4-match losing skid, just 4 wins in 10.

On paper it's close: comparable ratings, comparable serve numbers, small margins everywhere. The edge belongs to Sierra — real, but not the kind you take for granted at this level.