Janice Tjen and Martina Okalova will square off in the 2^nd round of the SP Open for the 1^st time in their career. They are scheduled to compete on Wednesday at 3:00 pm on QUADRA 2. In this post, we analyze their head to head performance and prediction.

Prediction, odds and live streaming

The pick for Tennis Tonic is Janice Tjen who should win in 2 sets.

As per the initial odds, Janice Tjen is the pick to win this match.
Janice Tjen -> 1.106
Martina Okalova -> 6.7

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Prediction and head to head Janice Tjen vs. Martina Okalova

There is no head to head record between Janice Tjen and Martina Okalova since this will be the first time that they will play each other in the main tour.

Janice Tjen

Ranked no. 130 (career-high), Tjen got to the 2^nd round after defeating Leolia Jeanjean 6-2 6-3.

In the 1^st round, The Indonesian had a good straight sets win against Jeanjean (6-2 6-3). During the match, Tjen scored 66 points vs Jeanjean’s 54. The Indonesian was pretty aggressive to blast 30 winners.

Regarding the service games, Tjen bagged 5 aces and she committed only 9 double faults. Janice Tjen lost the serve once and she saved 3 break points. Furthermore, Tjen put 61% of her first serves in, winning 73% (30/41) of the points behind her 1st serve and 38% (10/26) on the 2nd serve. Tjen broke Jeanjean 4 times after converting 80% of her break points (4/5).

Tjen has a fantastic record in the last 4 years having won 84% of her matches (109-20). 55-11 on hard in 2025. Talking about her performance on the same surface of this event, Tjen has an aggregate91-19 match record in the last 4 years on hard.

Her best result of the season was winning the title the W35 Goyang where she overcame Lin Zhu in the final 6-4 6-1 and the W35 Andong where she overcame Yexin Ma in the final 6-4 6-2 and the W35 Luzhou where she beat Fangzhou Liu in the final 6-0 6-4 and the W50 Taizhou where she overcame Yidi Yang in the final 7-5 6-3 and the W35 Taipei where she overcame Momoko Kobori in the final 4-6 6-1 6-2.

Tjen has a compiled 60-11 win-loss record in 2025, 55-11 on hard (See FULL STATS).

Previously in Sao Paulo

Tjen has never competed in this tournament before.

Martina Okalova

Ranked no. 464, Okalova reached the 2^nd round after beating Martha Matoula 6-4 6-2, Alicia Herrero Linana 7-5 2-6 6-4 and Arina Rodionova 7-5 6-4.

In the 1^st round, Martina had a good straight sets win against Rodionova (7-5 6-4). During the match Okalova scored 96 points vs Rodionova’s 88. The Slovakian was very aggressive to blast 26 winners.

About the serving games, Okalova wasn’t able to score even 1 ace for the entire match and she was not very consistent on her 2nd serve to score 10 double faults. Martina Okalova lost the serve 5 times and she saved 9 break points. Furthermore, Okalova put 65% of her first serves in, winning 51% (26/51) of the points behind her 1st serve and 46% (13/28) on the 2nd serve. Martina broke Rodionova 7 times after converting 44% of her break points (7/16).

The Slovakian has a compiled 20-17 win-loss record in 2025, 7-4 on hard (See FULL STATS).

Previously in Sao Paulo

Martina has never competed in this tournament before.

H2H Performance in the tournament

Matches, sets, games and points

Points	Tjen	Okalova
Match played	1	3
Tot Set	2	7
Tot Games	17	70
Pts	66-54	270-245
Total Points	120	515
Winners	30	93
%Winners	45%	34%

Tjen played 1 match while Okalova competed in 3 matches. Okalova started her run from the qualifications while Tjen had a direct access to the main draw. At the moment, Martina Okalova surrendered 1 set while Janice Tjen hasn’t conceded a set so far. Tjen has played 5 set(s) less than Okalova (2 vs 7). Therefore, Tjen played 53 games less than Okalova. Tjen scored 30 winners (45% of the total points). On the other side, The Slovakian managed to score 93 winners (34%).

Serve Performance

Serve	Tjen	Okalova
Aces	5	1
Avg per match	5	0.3
1st in	41/67	164/245
%1st in	61%	67%
1st pts	30/41	93/164
%1st pts	73%	57%
2nd pts	10/26	38/81
%2nd pts	38%	47%

Tjen struck 5 aces . Okalova managed to score 1 ace (0.3 per match). Tjen won 73% points behind her first serve. She had a solid display on her second serve to win 38% of the points. On the other side, Okalova won 57% of the points behind her first serve. She had a solid display on her second serve to win 47% of the points.

How they played the important points

Breaks	Tjen	Okalova
Won	4	19
Converted	4/5	19/41
% Converted	80%	46%
Conceded	4	38
Saved	3	24
% Saved	75%	63%
Times Broken	1	14

Tjen broke her opponent 4 times with a 80% conversion rate. Tjen lost her serve once and she saved 75% of the break points that she conceded. The Slovakian broke her opponents 19 times with a 46% conversion rate. Martina conceded her serve 14 times and she saved 63% of the break points that she conceded.

Tjen
	R1 Jeanjean	Total
Score	6-2 6-3
Tot Set	2	2
Tot Games	17	17
pts	66-54	66-54
Total points	120	120
Winners	30	30
%Winners	45%	45%
SERVE
Aces	5	5
Double Faults	9	9
1st in	41/67	41/67
% 1st in	61%	61%
1st pts	30/41	30/41
% 1st pts	73%	73%
2nd pts	10/26	10/26
% 2nd pts	38%	38%
Breaks
Won	4	4
Converted	4/5	4/5
Converted %	80%	80%
Conceded	4	4
Saved	3/4	3
Saved %	75%	75%
Times Broken	1	1

Okalova
	Q1 Matoula	Q3 Herrero Linana	R1 Rodionova	Total
Score	6-4 6-2	7-5 2-6 6-4	7-5 6-4
Tot Set	2	3	2	7
Tot Games	18	30	22	70
pts	74-59	100-98	96-88	270-245
Total points	133	198	184	515
Winners	25	42	26	93
%Winners	34%	42%	27%	34%
SERVE
Aces	0	1	0	1
Double Faults	2	8	10	20
1st in	41/69	72/97	51/79	164/245
% 1st in	59%	74%	65%	67%
1st pts	25/41	42/72	26/51	93/164
% 1st pts	61%	58%	51%	57%
2nd pts	16/28	9/25	13/28	38/81
% 2nd pts	57%	36%	46%	47%
Breaks
Won	5	7	7	19
Converted	5/12	7/13	7/16	19/41
Converted %	42%	54%	44%	46%
Conceded	8	16	14	38
Saved	6/8	9/16	9/14	24
Saved %	75%	56%	64%	195%
Times Broken	2	7	5	14

Tennis Scores in Sao Paulo

• Lorenzo GiustinoGiustino – Alexandre MullerMuller (3-6 6-4 6-4) – Stats, scores, rankings
• Bernabe Zapata MirallesZapata Miralles – Botic Van De ZandschulpVan De Zandschulp (4-6 6-1 6-4) – Stats, scores, rankings
• Pedro SousaSousa – Juan Pablo VarillasPablo Varillas (7-6³ 6-3) – Stats, scores, rankings
• Oriol Roca BatallaRoca Batalla – Carlos BerlocqBerlocq (6-4 6-4) – Stats, scores, rankings
• Geoffrey BlancaneauxBlancaneaux – Sergio GaldosGaldos (6-2 6-0) – Stats, scores, rankings
• Daniel Elahi GalanElahi Galan – Matteo MartineauMartineau (6-3 7-6³) – Stats, scores, rankings
• Kimmer CoppejansCoppejans – Jonathan EyssericEysseric (6-1 6-3) – Stats, scores, rankings
• Steven DiezDiez – Manuel GuinardGuinard (6-4 6-3) – Stats, scores, rankings
• Constant LestienneLestienne – Holger Vitus Nodskov RuneVitus Nodskov Rune (6-4 6-3) – Stats, scores, rankings
• Daniel Dutra Da SilvaDutra Da Silva – Kaichi UchidaUchida (6-4 6-4) – Stats, scores, rankings
• Tristan LamasineLamasine – Scott GriekspoorGriekspoor (7-6⁵ 6-4) – Stats, scores, rankings
• Pedro CachinCachin – Roberto Ortega-OlmedoOrtega-Olmedo (6-0 6-2) – Stats, scores, rankings
• Johan Sebastien TatlotSebastien Tatlot – Maxime HamouHamou (6-3 6-4) – Stats, scores, rankings
• Facundo ArguelloArguello – Arthur RinderknechRinderknech (6-2 2-6 6-1) – Stats, scores, rankings
• Pedro Martinez PorteroMartinez Portero – Jose Hernandez-FernandezHernandez-Fernandez (6-4 7-5) – Stats, scores, rankings
• Federico CoriaCoria – Peter TorebkoTorebko (6-3 6-4) – Stats, scores, rankings

Upcoming matches in the draw

• Beatriz Haddad MaiaHaddad Maia – Miriana TonaTona (0-0) – H2H and prediction
• Berfu CengizCengiz – Renata ZarazuaZarazua (0-0) – H2H and prediction
• Victoria RodriguezRodriguez – (0-0) – H2H and prediction
• Julia RieraRiera – (1-1) – H2H and prediction
• Francesca JonesJones – Whitney OsuigweOsuigwe (0-0) – H2H and prediction