Tennis predictions, October 21, 2026: Alexandrova vs Kostyuk, Swiatek vs Bouzkova

A spot in the next round is at stake on Wednesday, when Ekaterina Alexandrova goes up against Marta Kostyuk in the Ningbo round of 16. Marta Kostyuk has dropped 3 straight and sits at 6-4 over the last ten. Ekaterina Alexandrova is searching for form, having lost 2 in a row (5 of the last 10).

Marta Kostyuk simply rates much higher on hard, and our number follows from it. The edge belongs to Kostyuk — real, but not the kind you take for granted at this level.

Iga Swiatek and Marie Bouzkova meet in the round of 16 at Ningbo on Wednesday. Iga Swiatek is 7-3 across recent matches. Marie Bouzkova is 6-4 across recent matches.

Iga Swiatek is clearly higher-rated on hard — our number puts Swiatek around 73%. Bouzkova needs several things to break right at once; the percentages say they usually don't.

Wednesday's Brussels round of 16 pits Mariano Navone against Tallon Griekspoor on hard. Mariano Navone limps in on a 3-match losing skid, just 4 wins in 10. Tallon Griekspoor limps in on a 3-match losing skid, just 4 wins in 10.

On paper it's close: comparable ratings, comparable serve numbers, small margins everywhere. This one is close to a coin flip, and the lean toward Navone is exactly that — a lean.

A spot in the next round is at stake on Wednesday, when Sara Bejlek goes up against Sorana Cirstea in the Ningbo round of 16. Sorana Cirstea is 5-5 across recent matches. Sara Bejlek has dropped 2 straight and sits at 5-5 over the last ten.

Cirstea's 62.9% behind the first serve (against 58.3% for Bejlek) means break chances should be scarce in one direction. The edge belongs to Cirstea — real, but not the kind you take for granted at this level.

Ashlyn Krueger and Lanlana Tararudee meet in the round of 16 at Osaka on Wednesday. Ashlyn Krueger has won 5 of the last 10. Lanlana Tararudee is 6-4 across recent matches.

Ashlyn Krueger is clearly higher-rated on hard — our number puts Krueger around 51%. This one is close to a coin flip, and the lean toward Krueger is exactly that — a lean.

Wednesday's Osaka round of 16 pits Katie Boulter against Viktorija Golubic on hard. Viktorija Golubic is 6-4 across recent matches. Katie Boulter is searching for form, having lost 2 in a row (3 of the last 10).

On paper it's close: comparable ratings, comparable serve numbers, small margins everywhere. Boulter comes in off a compressed schedule. This one is close to a coin flip, and the lean toward Golubic is exactly that — a lean.

Wednesday's Ningbo round of 16 pits Aliaksandra Sasnovich against Leylah Fernandez on hard. Leylah Fernandez is 7-3 across recent matches. Aliaksandra Sasnovich is 5-5 across recent matches.

Hold strength tells the story — 64.8% versus 60.5% on first-serve points in Fernandez's favor. The edge belongs to Fernandez — real, but not the kind you take for granted at this level.

Wednesday's Osaka round of 16 pits Lilli Tagger against Tereza Valentova on hard. Tereza Valentova comes in at 6 wins from the last ten. Lilli Tagger comes in at 5 wins from the last ten.

The underlying stats are tight across the board — this is a matchup decided by a handful of points. Valentova comes in off a compressed schedule. A tiebreak or two would surprise nobody, with Valentova fractionally more likely to land the big points.

A spot in the next round is at stake on Wednesday, when Francisco Cerundolo goes up against Martin Damm in the Brussels round of 16. Francisco Cerundolo has won 6 of the last 10. Martin Damm has won 4 of the last 10.

Francisco Cerundolo simply rates much higher on hard, and our number follows from it. Expect resistance, but the match-level math tilts clearly toward Cerundolo.

Wednesday's Brussels round of 16 pits Clement Chidekh against Jacob Fearnley on hard. Jacob Fearnley has won 7 of the last 10. Clement Chidekh is 7-3 across recent matches.

The underlying stats are tight across the board — this is a matchup decided by a handful of points. Expect resistance, but the match-level math tilts clearly toward Fearnley.

Wednesday's Brussels round of 32 pits Damir Dzumhur against Dino Prizmic on hard. Dino Prizmic comes in at 6 wins from the last ten. Damir Dzumhur is rolling — 4 straight wins, 6 of 10 in recent play.

Hold strength tells the story — 68.5% versus 64.9% on first-serve points in Prizmic's favor. The edge belongs to Prizmic — real, but not the kind you take for granted at this level.

A spot in the next round is at stake on Wednesday, when Benjamin Bonzi goes up against Tommy Paul in the Lyon (France) round of 16. Tommy Paul is 6-4 across recent matches. Benjamin Bonzi comes in at 6 wins from the last ten.

Tommy Paul is clearly higher-rated on clay — our number puts Paul around 74%. If Paul plays anywhere close to a normal level, this ends in relatively comfortable fashion.

Sinja Kraus and Talia Gibson meet in the round of 16 at Osaka on Wednesday. Talia Gibson has won 5 of the last 10. Sinja Kraus comes in at 5 wins from the last ten.

The serve is where this match separates: Gibson has been winning 64.3% of first-serve points to Kraus's 58.9%, and on hard that gap compounds fast. This one is close to a coin flip, and the lean toward Gibson is exactly that — a lean.

Wednesday's Lyon (France) round of 32 pits Martin Landaluce against Stan Wawrinka on clay. Martin Landaluce is rolling — 4 straight wins, 5 of 10 in recent play. Stan Wawrinka is searching for form, having lost 3 in a row (2 of the last 10).

Martin Landaluce simply rates much higher on clay, and our number follows from it. Little separates them; Landaluce gets the nod on the finest of margins.

Wednesday's Ningbo round of 16 pits Anastasia Zakharova against Marie Bouzkova on hard. Marie Bouzkova is 6-4 across recent matches. Anastasia Zakharova comes in at 3 wins from the last ten.

Marie Bouzkova simply rates much higher on hard, and our number follows from it. Bouzkova should have enough here, though Zakharova has the tools to make the scoreboard uncomfortable.

Gauthier Onclin and Jan Lennard Struff meet in the round of 16 at Brussels on Wednesday. Jan Lennard Struff has won 4 of the last 10. Gauthier Onclin limps in on a 3-match losing skid, just 3 wins in 10.

Hold strength tells the story — 76.6% versus 64.9% on first-serve points in Struff's favor. Expect resistance, but the match-level math tilts clearly toward Struff.

A spot in the next round is at stake on Wednesday, when David Goffin goes up against Remy Bertola in the Brussels round of 32. David Goffin is searching for form, having lost 8 in a row (2 of the last 10). Remy Bertola has dropped 2 straight and sits at 3-7 over the last ten.

There's a wide gap in our ratings on hard, and our number follows from it. A tiebreak or two would surprise nobody, with Goffin fractionally more likely to land the big points.