Prediction of Erika Sema vs Ayumi Oka Head-to-Head, At

Wojtek Kolan

Our Predictions

H2H Records Career Stats

HEAD TO HEAD
E. Sema vs A. Oka

Erika Sema

JPN

1

Win

Played

1

Win

Age

Height

604

C. Rank

Ret.

114

Best Rank

297

Total Titles

YTD Titles

$117.4K

Career Money

Plays

Ayumi Oka

JPN

1

Win

Played

1

Win

Age

Height

604

C. Rank

Ret.

114

Best Rank

297

Total Titles

YTD Titles

$117.4K

Career Money

Plays

Head-to-head: Sema 1 - 1 Oka

They have played 4 sets in total, with Erika Sema winning 2 and Ayumi Oka winning 2. The last match between Ayumi Oka and Erika Sema was at the Toyota, 21-11-2011, Round: R1, Surface: Carpet, with Ayumi Oka getting the victory 6-2 6-2.

Players	Head To Head Match Wins
Sema	1
Oka	1

Last 2 H2H Matches:

(R1) Toyota(11-21-11)

Stats

Ayumi Oka

Erika Sema

(R1) Makinohara(10-17-11)

Stats

Erika Sema

Ayumi Oka

E. Sema vs A. Oka H2H Profile

E. Sema	Stats	A. Oka
$117,356	Career Prize Money	$0
52.41% (501-455)	Career Total W/L	48.87% (108-113)
1	Indoor	1
11	Titles	2
1	Total H2H Matches	1
0% (0-0)	YTD Win/Loss	0% (0-0)

E. Sema vs A. Oka Match Preview:

Second serve performance recent form: In recent form (last 6 months), Erika Sema has won 35.88% of points on their second serve, while Ayumi Oka has won 0%. There is a high correlation between this stat and match prediction accuracy.
Return game stats recent form: Return stats show Erika Sema, in recent form, has won 53.53% of their opponent's second serve points, while Ayumi Oka has won 0%. The same stats for first serve returns are 35.48% and 0% respectively and this has a high correlation to pick who is favored in this H2H matchup.
Under pressure analysis: Erika Sema has saved 48.35% of breakpoints in recent form, whereas Ayumi Oka has saved 0% which is a useful statistic for in-game betting predictions.
Performance overview: Over the last year Erika Sema has won 52.94% of matches played (W/L 27/24), with Ayumi Oka winning 0% (W/L 0/0) that gives us an overall head-to head prediction overview.
Best surface: Erika Sema has their best career surface win % on Hard, winning 55% (W/L 389/318), and worse career win % on Grass, winning 42% (W/L 15/21). Ayumi Oka has their best career surface win % on Clay, winning 55% (W/L 9/7), and worse career win % on Grass, winning 0% (W/L 0/1).
Player level: In the last year, Erika Sema has played most of their matches on the Challengers/ITF tournaments > $10K, winning 51.28% of matches (W/L 20/19), where as Ayumi Oka has played most of their matches on the N/A, winning 0% of matches (W/L 0/0). When comparing stats between players to predict the favorite, it is of course all relative to the event level they have been playing at.
Direct H2H matches: They have played 2 times before with Erika Sema winning 1 times and Ayumi Oka being victorious 1 times. They have played 4 sets in total, with Erika Sema winning 2 and Ayumi Oka winning 2.
The last match between Erika Sema and Ayumi Oka was at the Toyota, 21-11-2011, Round: R1, Surface: Carpet, with Ayumi Oka getting the victory 6-2 6-2.
Head to head match duration: In past head to head matches, the average match time between these players has been 0:0:0.
Opponent quality stats: Over the last 12 months, Erika Sema has played against opponents with an average rank of 408.1 while Ayumi Oka has played against players with an average rank of 0.
Deciding set performance vs all players: If you are interested in live predictions and betting, if this match goes into a deciding set, Erika Sema has won 56% of deciding sets over the last 12 months, while Ayumi Oka has won 0% in all matches played on tour.
Break point conversion: In recent form, Erika Sema has converted 43.35% of breakpoint opportunities, and Ayumi Oka has converted 0% of their chances to break their opponents serve. A telling stat for in-game live betting tips when either player has a breakpoint opportunity.

Erika Sema vs Ayumi Oka Editorial Preview By TennisTipster88.

E. Sema vs A. Oka H2H Stats Used In Our Predictions

E. Sema	Stats	A. Oka
1	H2H Matches Won	1
2	Sets Won	2
16	Games Won	17
0:0:0	Average Match Time	0:0:0
50% (1/2)	Best‑of‑3 Win %	50% (1/2)
100% (1/1)	1st Set Won, Won Match	100% (1/1)
0% (0/1)	1st Set Won, Lost Match	0% (0/1)
0% (0/1)	1st Set Lost, Won Match	0% (0/1)

Recent Performance Stats

E. Sema Recent Matches Played

OPPONENT	RESULT	SCORE	H2H
W100 Takasaki - 17-11-2025
Q3 Jana KolodynskaJ. Kolodynska	L	6-0 6-3	Stats
Q1 Kisa YoshiokaK. Yoshioka	W	6-1 4-6 6-4	Stats
W35 Hamamatsu - 03-11-2025
R1 Sara SaitoS. Saito	L	6-1 6-2	Stats
W35 Brisbane - 27-10-2025
SF Natsumi KawaguchiN. Kawaguchi	L	6-1 7-5	Stats
QF Elena MicicE. Micic	W	w/o	Stats

View All

A. Oka Recent Matches Played

OPPONENT	RESULT	SCORE	H2H
Nishi-Tama - 26-03-2012
R1 Yumi NakanoY. Nakano	L	6-7(3) 6-3 6-4	Stats
Kofu - 19-03-2012
R1 Yumi MiyazakiY. Miyazaki	W	3-6 6-4 6-2	Stats
QF Hiroko KuwataH. Kuwata	L	4-6 7-5 6-3	Stats
R2 Ting-Fei JuanT. Juan	W	6-3 5-7 6-4	Stats
Sydney - 13-02-2012
Q2 Nicola GeuerN. Geuer	L	6-1 6-0	Stats

View All

E. Sema vs A. Oka Stats Breakdown Vs All H2H Opponents

E. Sema	Stats	A. Oka
52.46% (501/454)	YTD Win/Loss	49.09% (108/112)
52.01% (1136/1048)	Sets Win/Loss	48.82% (249/261)
51.54% (10209/9600)	Games Win/Loss	49.82% (2317/2334)
55.02% (389/318)	Hard Win/Loss	44.05% (37/47)
44.68% (42/52)	Clay Win/Loss	56.25% (9/7)
46.61% (55/63)	Indoor Hard W/L	52.10% (62/57)
41.67% (15/21)	Grass Win/Loss	0.00% (0/1)
0.04	Aces Per Game	0
379	Aces Total	0
0.17	Double Faults Per Game	0
1681	Total Double Faults	5
1st Match	Average Match Time	1st Match
589.1	Average Opponent Rank	566.59
73% (25647/35272)	1st Serve %	60% (34/57)
57% (14550/25647)	1st Serve Win %	53% (18/34)
43% (4138/9625)	2nd Serve Win %	57% (13/23)
49% (2304/4686)	Break Points Won % (Total)	40% (2/5)
47% (16706/35557)	Return Points Win %	38% (25/65)
33.33% (8/16)	Slam W/L	0% (0/0)
40.00% (2/3)	Masters W/L	0.00% (0/1)
39.13% (18/28)	Main Tour W/L	0.00% (0/2)
52.84% (419/374)	Challenger W/L	39.66% (46/70)
62.07% (54/33)	Futures W/L	61.39% (62/39)
52% (484/935)	Best of 3 Sets Win %	49% (107/217)
100% (3/3)	Best of 5 Sets Win %	0% (0/0)
44% (72/163)	Tiebreaks Win % (Total)	45% (18/40)
48% (140/290)	Deciding Set Win %	55% (40/73)
84% (504/425)	1st Set Won, Won Match	81% (107/87)
15% (504/77)	1st Set Won, Lost Match	19% (107/20)
15% (450/68)	1st Set Lost, Won Match	19% (113/22)