Elise Mertens and Lulu Sun will fight against each other in the 2^nd round of the U.S. Open for the 1^st time in their career. They are scheduled to play on Wednesday at 5:00 pm on Court 5. In the following lines you can find the head to head analysis and prediction.

Prediction, odds and live streaming

The pick for Tennis Tonic is Elise Mertens who should win in 2 sets.

As per the initial odds, Elise Mertens is the pick to win this match.
Elise Mertens -> 1.31
Lulu Sun -> 3.45

Click here to see the updated quotes and live streaming (only selected countries - USA excluded).

To be able to watch live streaming bet365, a funded account is required or you need to have placed a bet in the last 24 hours. 18+ BeGambleAware.

Here where top tennis events are broadcasted or streamed online (ATP, WTA).

At the challenger level, there will be free live streaming on Challenger TV.

 

Prediction and head to head Elise Mertens vs. Lulu Sun

There is no head to head record between Elise Mertens and Lulu Sun since this will be the first time that they will play each other in the main tour.

Elise Mertens

Ranked no. 21, Elise reached the 2^nd round after defeating Alyssa Ahn 6-1 6-0.

In the 1^st round, Elise had a good straight sets win against Ahn (6-1 6-0). During the match, Mertens scored 55 points vs Ahn’s 25. Mertens was pretty aggressive to blast 15 winners.

Talking about the service games, Mertens scored 5 aces and she was quite consistent in conceding no double faults. Elise Mertens was pretty effective on serve to win 94% (15/16) of her 1st serve and 67% (10/15) on the second serve. This was the main reason for not conceding a single break during the match. The Belgian broke Ahn 6 times after converting 60% of her break points (6/10).

Mertens has a solid match record in the last 10 years having won 62% of her matches (355-220). 14-9 on hard in 2025. Regarding her performance on the same surface of this event, Mertens has a composed 201-121 match record in the last years on hard.

Her best result of the current year was winning the title in Singapore where she defeated Ann Li in the final 6-1 6-4 and in Hertogenbosch where she defeated Elena Gabriela Ruse in the final 6-3 7-6(4).

Elise has a composed 33-16 win-loss record in 2025, 14-9 on hard (See FULL STATS).

Previously at the U.S. Open

Lulu Sun

Ranked no. 164, Sun got to the 2^nd round after beating Maria Camila Osorio Serrano 6-4 2-6 6-0.

In the 1^st round, The Kiwi defeated Camila Osorio Serrano (6-4 2-6 6-0). During the match Sun scored 74 points vs Camila Osorio Serrano’s 58. Sun was quite aggressive to blast 26 winners.

Talking about serving, Sun blasted 6 aces and she committed only 6 double faults. Lulu Sun lost the serve 4 times and she saved 2 break points. Furthermore, Sun put 57% of her first serves in, winning 70% (26/37) of the points behind her 1st serve and 46% (13/28) on the 2nd serve. Sun broke Camila Osorio Serrano 6 times after converting 67% of her break points (6/9).

Sun has an aggregate 17-22 win-loss record in 2025, 12-12 on hard (See FULL STATS).

Previously at the U.S. Open

Previously, her best result was reaching the 1^st round in 2024. See her history.

H2H Performance in the tournament

Matches, sets, games and points

Points	Mertens	Sun
Match played	1	1
Tot Set	2	3
Tot Games	13	24
Pts	55-25	74-58
Total Points	80	132
Winners	15	26
%Winners	27%	35%

Both Mertens and Sun played 1 match. At the moment, Lulu Sun dropped 1 set while Elise Mertens hasn’t surrendered a set so far. Mertens has played 1 set(s) less than Sun (2 vs 3). Therefore, Mertens played 11 games less than Sun. The Belgian scored 15 winners (27% of the total points). On the other side, LuluAnke bagged 26 winners (35%).

Serve Performance

Serve	Mertens	Sun
Aces	5	6
Avg per match	5	6
1st in	16/31	37/65
%1st in	52%	57%
1st pts	15/16	26/37
%1st pts	94%	70%
2nd pts	10/15	13/28
%2nd pts	67%	46%

Mertens blasted 5 aces . Sun struck 6 aces . Mertens won 94% points behind her first serve. She quite strong on her second serve to win 67% of the points. On the other side, Sun won 70% of the points on her first serve. She had a solid display on her second serve to win 46% of the points.

How they played the important points

Breaks	Mertens	Sun
Won	6	6
Converted	6/10	6/9
% Converted	60%	67%
Conceded	0	6
Saved	0	2
% Saved	0%	33%
Times Broken	0	4

The Belgian broke her opponent 6 times with a 60% conversion rate. The Belgian was rock solid on her serve as she has never surrendered a single service game after saving 0 break points. Sun broke her opponent 6 times with a 67% conversion rate. LuluAnke conceded her serve 4 times and she saved 33% of the break points that she conceded.

Mertens
	R1 Ahn	Total
Score	6-1 6-0
Tot Set	2	2
Tot Games	13	13
pts	55-25	55-25
Total points	80	80
Winners	15	15
%Winners	27%	27%
SERVE
Aces	5	5
Double Faults	0	0
1st in	16/31	16/31
% 1st in	52%	52%
1st pts	15/16	15/16
% 1st pts	94%	94%
2nd pts	10/15	10/15
% 2nd pts	67%	67%
Breaks
Won	6	6
Converted	6/10	6/10
Converted %	60%	60%
Conceded	0	0
Saved	0/0	0
Saved %	–	0%
Times Broken	0	0

Sun
	R1 Camila Osorio Serrano	Total
Score	6-4 2-6 6-0
Tot Set	3	3
Tot Games	24	24
pts	74-58	74-58
Total points	132	132
Winners	26	26
%Winners	35%	35%
SERVE
Aces	6	6
Double Faults	6	6
1st in	37/65	37/65
% 1st in	57%	57%
1st pts	26/37	26/37
% 1st pts	70%	70%
2nd pts	13/28	13/28
% 2nd pts	46%	46%
Breaks
Won	6	6
Converted	6/9	6/9
Converted %	67%	67%
Conceded	6	6
Saved	2/6	2
Saved %	33%	33%
Times Broken	4	4

Tennis Scores – U.S. Open

• 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
• 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
• Gregoire BarrereBarrere – James DuckworthDuckworth (7-6³ 6-3) – 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

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
• Emma RaducanuRaducanu – (0-0) – H2H and prediction
• Mccartney KesslerKessler – Marketa VondrousovaVondrousova (0-1) – H2H and prediction
• Jessica PegulaPegula – Anna BlinkovaBlinkova (4-1) – H2H and prediction
• Victoria AzarenkaAzarenka – Anastasia PavlyuchenkovaPavlyuchenkova (7-2) – H2H and prediction
• Ludmilla SamsonovaSamsonova – Priscilla HonHon (0-1) – H2H and prediction
• Ann LiLi – Belinda BencicBencic (0-0) – H2H and prediction
• Emma NavarroNavarro – Caty McNallyMcNally (1-1) – 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
• Darya KasatkinaKasatkina – Kamilla RakhimovaRakhimova (0-0) – H2H and prediction
• Magdalena FrechFrech – Peyton StearnsStearns (0-2) – H2H and prediction
• Maria SakkariSakkari – Anna BondarBondar (1-0) – H2H and prediction
• Anna KalinskayaKalinskaya – Yulia PutintsevaPutintseva (0-0) – H2H and prediction
• Suzan LamensLamens – Iga SwiatekSwiatek (0-0) – H2H and prediction
• Francesca JonesJones – Eva LysLys (0-0) – H2H and prediction
• Sorana CirsteaCirstea – (0-0) – H2H and prediction
• Hailey BaptisteBaptiste – Katerina SiniakovaSiniakova (0-0) – H2H and prediction
• Greetje MinnenMinnen – Naomi OsakaOsaka (0-1) – H2H and prediction
• Donna VekicVekic – Jessica Bouzas ManeiroBouzas Maneiro (1-0) – H2H and prediction
• Ajla TomljanovicTomljanovic – Cori GauffGauff (0-1) – H2H and prediction
• Amanda AnisimovaAnisimova – Kimberly BirrellBirrell (0-0) – H2H and prediction
• Danielle Rose CollinsRose Collins – Jaqueline CristianCristian (1-0) – H2H and prediction
• Beatriz Haddad MaiaHaddad Maia – (0-1) – H2H and prediction
• Ekaterina AlexandrovaAlexandrova – Anastasija SevastovaSevastova (0-0) – H2H and prediction
• Caroline DolehideDolehide – Xin Yu WangYu Wang (0-1) – H2H and prediction
• Anastasia ZakharovaZakharova – Elina AvanesyanAvanesyan (1-0) – H2H and prediction
• Laura SiegemundSiegemund – (2-0) – H2H and prediction