Marta Kostyuk and Zeynep Sonmez will fight against each other in the 2^nd round of the U.S. Open for the 2^nd time in their career. They are scheduled to compete on Thursday at 1:00 pm on Court 12. In the following paragraphs, you can find the head to head analysis and prediction.

Prediction, odds and live streaming

The pick for Tennis Tonic is Marta Kostyuk who should win in 2 sets.

As per the initial odds, Marta Kostyuk is the pick to win this match.
Marta Kostyuk -> 1.26
Zeynep Sonmez -> 3.85

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Prediction and head to head Marta Kostyuk vs. Zeynep Sonmez

This will be the 2^nd time that Marta Kostyuk and Zeynep Sonmez face off. The head to head is 1-0 for Kostyuk (see full H2H stats), 1-0 on hard.

The last time that they competed against each other, Kostyuk won 6-3 6-3 in the 1^st round in Doha back in February 2025.

Marta Kostyuk

Ranked no. 28, the Ukrainian reached the 2^nd round after defeating Katie Boulter 6-4 6-4.

In the 1^st round, Marta had a good straight sets win against Boulter (6-4 6-4). During the match, Kostyuk scored 73 points vs Boulter’s 63. The Ukrainian was pretty aggressive to blast 26 winners.

Talking about the service games, Kostyuk fired 9 aces and she committed only 5 double faults. Marta Kostyuk lost the serve twice and she saved 8 break points. Furthermore, Kostyuk put 58% of her first serves in, winning 68% (26/38) of the points behind her 1st serve and 57% (16/28) on the 2nd serve. Marta broke Boulter 4 times after converting 44% of her break points (4/9).

Kostyuk has a solid win-loss record in the last 10 years having won 62% of her matches (240-147). 15-10 on hard in 2025. Talking about her performance on the same surface of this tournament, Kostyuk has a composed 130-78 match record in the last years on hard.

Kostyuk has an overall 22-17 win-loss record in 2025, 15-10 on hard (See FULL STATS).

Previously at the U.S. Open

Zeynep Sonmez

Ranked no. 81, Zeynep reached the 2^nd round after beating Katie Volynets 6-3 6-4.

In the 1^st round, Zeynep had a good straight sets win against Volynets (6-3 6-4). During the match Sonmez scored 67 points vs Volynets’s 47. The Turk was pretty aggressive to blast 24 winners.

Talking about serving, Sonmez was unable to score even 1 ace for the entire match and she committed only 2 double faults. Overall, Zeynep Sonmez was extremely effective on serve to win 80% (24/30) of her 1st serve and 52% (15/29) on the second serve. However, this didn’t prevent her to concede the serve twice. The Turk broke Volynets 4 times after converting 50% of her break points (4/8).

Zeynep has an overall 19-19 win-loss record in 2025, 8-9 on hard (See FULL STATS).

Previously at the U.S. Open

Previously, her best result was reaching the qualifications in 2024. See her history.

H2H Performance in the tournament

Matches, sets, games and points

Points	Kostyuk	Sonmez
Match played	1	1
Tot Set	2	2
Tot Games	20	19
Pts	73-63	67-47
Total Points	136	114
Winners	26	24
%Winners	36%	36%

Both Kostyuk and Sonmez played 1 match. Both players have not conceded a single set in this event so far. Talking about their workload, Kostyuk and Sonmez have played the same amount of sets 2. However, Kostyuk played 1 game more than Sonmez. Marta scored 26 winners (36% of the total points). On the other side, The Turk bagged 24 winners (36%).

Serve Performance

Serve	Kostyuk	Sonmez
Aces	9	0
Avg per match	9	0
1st in	38/66	30/59
%1st in	58%	51%
1st pts	26/38	24/30
%1st pts	68%	80%
2nd pts	16/28	15/29
%2nd pts	57%	52%

Kostyuk made 9 aces . Sonmez didn’t manage to fire a single ace to far. Kostyuk won 68% points on her first serve. She was rock solid on her second serve to win 57% of the points. On the other side, Sonmez won 80% of the points behind her first serve. She had a solid display on her second serve to win 52% of the points.

How they played the important points

Breaks	Kostyuk	Sonmez
Won	4	4
Converted	4/9	4/8
% Converted	44%	50%
Conceded	10	5
Saved	8	3
% Saved	80%	60%
Times Broken	2	2

The Ukrainian broke her opponent 4 times with a 44% conversion rate. The Ukrainian conceded her serve twice and she saved 80% of the break points that she conceded. The Turk broke her opponent 4 times with a 50% conversion rate. Sonmez conceded her serve twice and she saved 60% of the break points that she conceded.

Kostyuk
	R1 Boulter	Total
Score	6-4 6-4
Tot Set	2	2
Tot Games	20	20
pts	73-63	73-63
Total points	136	136
Winners	26	26
%Winners	36%	36%
SERVE
Aces	9	9
Double Faults	5	5
1st in	38/66	38/66
% 1st in	58%	58%
1st pts	26/38	26/38
% 1st pts	68%	68%
2nd pts	16/28	16/28
% 2nd pts	57%	57%
Breaks
Won	4	4
Converted	4/9	4/9
Converted %	44%	44%
Conceded	10	10
Saved	8/10	8
Saved %	80%	80%
Times Broken	2	2

Sonmez
	R1 Volynets	Total
Score	6-3 6-4
Tot Set	2	2
Tot Games	19	19
pts	67-47	67-47
Total points	114	114
Winners	24	24
%Winners	36%	36%
SERVE
Aces	0	0
Double Faults	2	2
1st in	30/59	30/59
% 1st in	51%	51%
1st pts	24/30	24/30
% 1st pts	80%	80%
2nd pts	15/29	15/29
% 2nd pts	52%	52%
Breaks
Won	4	4
Converted	4/8	4/8
Converted %	50%	50%
Conceded	5	5
Saved	3/5	3
Saved %	60%	60%
Times Broken	2	2

Tennis Scores – U.S. Open

• Emma RaducanuRaducanu – Janice TjenTjen (6-2 6-1) – Stats, scores, rankings
• Victoria AzarenkaAzarenka – Anastasia PavlyuchenkovaPavlyuchenkova (6-3 6-3) – Stats, scores, rankings
• Cristina BucsaBucsa – Alexandra EalaEala (6-4 6-3) – Stats, scores, rankings
• Emma NavarroNavarro – Caty McNallyMcNally (6-2 6-1) – Stats, scores, rankings
• Marius CopilCopil – Mitchell KruegerKrueger (7-6⁵ 7-6⁴) – Stats, scores, rankings
• Jason JungJung – Alex BoltBolt (7-6² 6-1) – Stats, scores, rankings
• Jiri VeselyVesely – Bjorn FratangeloFratangelo (6-1 6-4) – Stats, scores, rankings
• Antoine HoangHoang – Lukas LackoLacko (6-3 7-5) – Stats, scores, rankings
• Ugo HumbertHumbert – Stefano NapolitanoNapolitano (4-6 6-4 6-0) – Stats, scores, rankings
• Ruben BemelmansBemelmans – Evgeny KarlovskiyKarlovskiy (6-4 6-1) – Stats, scores, rankings
• Mikael YmerYmer – Brydan KleinKlein (6-3 6-1) – Stats, scores, rankings
• Dominik KoepferKoepfer – Yannick MadenMaden (6-2 6-4) – Stats, scores, rankings
• Soon-Woo KwonKwon – Gianluca MagerMager (4-6 6-2 6-0) – Stats, scores, rankings
• Lukas RosolRosol – Denis IstominIstomin (6-3 4-6 6-4) – Stats, scores, rankings
• Go SoedaSoeda – Salvatore CarusoCaruso (0-6 6-1 6-4) – Stats, scores, rankings
• Paul JubbJubb – Thiago Moura MonteiroMoura Monteiro (4-6 6-3 6-2) – Stats, scores, rankings
• Dennis NovakNovak – Jason Murray KublerMurray Kubler (7-6⁵ 6-3) – Stats, scores, rankings
• Marcel GranollersGranollers – Marcos GironGiron (6-4 6-3) – Stats, scores, rankings
• Kamil MajchrzakMajchrzak – Yuichi SugitaSugita (7-6¹ 6-3) – Stats, scores, rankings
• Gregoire BarrereBarrere – James DuckworthDuckworth (7-6³ 6-3) – Stats, scores, rankings

Upcoming matches in the draw

• Aryna SabalenkaSabalenka – (1-0) – H2H and prediction
• Elsa JacquemotJacquemot – Leylah Annie FernandezAnnie Fernandez (0-0) – H2H and prediction
• Elise MertensMertens – Lulu SunSun (0-0) – H2H and prediction
• Cristina BucsaBucsa – (0-1) – H2H and prediction
• Elena RybakinaRybakina – (0-0) – H2H and prediction
• Mccartney KesslerKessler – Marketa VondrousovaVondrousova (0-1) – H2H and prediction
• Jessica PegulaPegula – Anna BlinkovaBlinkova (4-1) – H2H and prediction
• Ludmilla SamsonovaSamsonova – Priscilla HonHon (0-1) – H2H and prediction
• Ann LiLi – Belinda BencicBencic (0-0) – H2H and prediction
• Moyuka UchijimaUchijima – Barbora KrejcikovaKrejcikova (0-0) – H2H and prediction
• Jelena OstapenkoOstapenko – Taylor TownsendTownsend (1-1) – H2H and prediction
• Anastasia PotapovaPotapova – (1-1) – H2H and prediction
• Renata ZarazuaZarazua – Diane ParryParry (2-0) – H2H and prediction
• Zeynep SonmezSonmez – Marta KostyukKostyuk (0-1) – H2H and prediction
• Sorana CirsteaCirstea – Karolina MuchovaMuchova (1-5) – H2H and prediction
• Darya KasatkinaKasatkina – Kamilla RakhimovaRakhimova (0-0) – H2H and prediction
• Hailey BaptisteBaptiste – Naomi OsakaOsaka (0-2) – H2H and prediction
• Magdalena FrechFrech – Peyton StearnsStearns (0-2) – H2H and prediction
• Donna VekicVekic – Cori GauffGauff (1-1) – H2H and prediction
• Amanda AnisimovaAnisimova – (0-0) – H2H and prediction
• Jaqueline CristianCristian – (0-0) – H2H and prediction
• Beatriz Haddad MaiaHaddad Maia – Viktorija GolubicGolubic (1-4) – H2H and prediction
• Maria SakkariSakkari – Anna BondarBondar (1-0) – H2H and prediction
• Ekaterina AlexandrovaAlexandrova – Xin Yu WangYu Wang (1-2) – H2H and prediction
• Anastasia ZakharovaZakharova – Laura SiegemundSiegemund (0-1) – H2H and prediction
• Anna KalinskayaKalinskaya – Yulia PutintsevaPutintseva (0-0) – H2H and prediction
• Suzan LamensLamens – Iga SwiatekSwiatek (0-0) – H2H and prediction