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Osaka vs Siniakova US Open Matchup
Matchup: (13) Naomi Osaka vs (42) Katerina Siniakova
When: Sep 3 2026, at 11:30 AM
Tournament: US Open
Stage: Round of 64
Venue: Arthur Ashe Stadium
Location: New York City, New York
Tennis Match Odds, Spread, Moneyline & Total
Naomi Osaka vs Katerina Siniakova
Game Spread
Naomi Osaka -4.5 (-125)
Katerina Siniakova 4.5 (-105)
Naomi Osaka vs Katerina Siniakova
Moneyline
Naomi Osaka -400
Katerina Siniakova +300
Naomi Osaka vs Katerina Siniakova
Total
Over 21.0 (-115)
Under 21.0 (-115)
Go to the Prediction here
(Get real-time live scores & latest betting odds here!)
Osaka vs Siniakova WTA Tennis Preview
Naomi Osaka enters her US Open second-round matchup with Kateřina Siniaková as the stronger betting side. Osaka is 25-10 this season and survived two tiebreaks against Anastasia Zakharova, firing 11 aces while leaning on the power game that has already delivered two US Open titles.
Siniaková looked sharp in a 6-3, 6-2 opener, but her singles record sits at 16-16 and six double faults remain a concern. Osaka leads the H2H 2-1 and owns the clear hard-court edge. If her serve stays reliable, Osaka’s pace and return pressure should give her the cleaner betting profile.
Osaka vs Siniakova Matchups Props
Naomi Osaka vs Katerina Siniakova
Game Spread
Naomi Osaka – S1 -1.5 (-200)
Katerina Siniakova – S1 1.5 (+150)
Naomi Osaka vs Katerina Siniakova
Moneyline
Naomi Osaka – S1 -285
Katerina Siniakova – S1 +210
Naomi Osaka vs Katerina Siniakova
Total
Over – S1 8.5 (-285)
Under – S1 8.5 (+210)
Naomi Osaka vs Katerina Siniakova
Match Specials
Osaka To Win & Over 20.5 Total Games +140
Osaka To Win & Under 20.5 Total Games +130
Siniakova To Win & Over 25.5 Total Games +650
Siniakova To Win & Under 25.5 Total Games +600
Osaka To Win Every Set 6-0, 6-1 or 6-2 +1200
Osaka To Win Every Set 6-3 or 6-4 +850
Osaka To Win Every Set 7-5 or 7-6 +4000
Osaka To Win Every Set 7-6 +11000
Siniakova To Win Every Set 6-0, 6-1 or 6-2 +15000
Siniakova To Win Every Set 6-3 or 6-4 +4000
Siniakova To Win Every Set 7-5 or 7-6 +10000
Siniakova To Win Every Set 7-6 +25000
Osaka To Win Her First 2 Service Games To 0 or 15 +525
Siniakova To Win Her First 2 Service Games To 0 or 15 +1200
Both Players Opening Service Games To Go To Deuce +850
Both Players To Face A Break Point In Their Opening Service Game +350
Match To Go To A Final Set Tie Break +1400
Osaka To Win Every Set 6-0, 6-1, 6-2, 6-3 or 6-4 +170
Siniakova To Win Every Set 6-0, 6-1, 6-2, 6-3 or 6-4 +1500
Naomi Osaka vs Katerina Siniakova
Alternate Total Games
Over 19.5 (-155)
Under 19.5 (+120)
Over 20.0 (-150)
Under 20.0 (+115)
Over 20.5 (-130)
Under 20.5 (EVEN)
Over 21.5 (EVEN)
Under 21.5 (-130)
Over 22.0 (+115)
Under 22.0 (-150)
Over 22.5 (+130)
Under 22.5 (-170)
Naomi Osaka vs Katerina Siniakova
Alternate Total Games
Over – S1 10.5 (+275)
Under – S1 10.5 (-400)
Over – S1 12.5 (+475)
Under – S1 12.5 (-800)
Naomi Osaka vs Katerina Siniakova
Total Games O/U – Katerina Siniakova
Over 9.5 (-115)
Under 9.5 (-115)
Naomi Osaka vs Katerina Siniakova
Total Games O/U – Naomi Osaka
Over 12.5 (-120)
Under 12.5 (-110)
Naomi Osaka vs Katerina Siniakova
Total Games O/U
Over – S1 9.5 (+105)
Under – S1 9.5 (-135)
Naomi Osaka vs Katerina Siniakova
Alternate Game Spread
Naomi Osaka -2.5 (-260)
Katerina Siniakova 2.5 (+190)
Naomi Osaka -3.5 (-175)
Katerina Siniakova 3.5 (+135)
Naomi Osaka -4.0 (-150)
Katerina Siniakova 4.0 (+115)
Naomi Osaka -5.0 (+120)
Katerina Siniakova 5.0 (-155)
Naomi Osaka -5.5 (+160)
Katerina Siniakova 5.5 (-210)
Naomi Osaka -6.5 (+220)
Katerina Siniakova 6.5 (-300)
Naomi Osaka vs Katerina Siniakova
Alternate Game Spread
Naomi Osaka – S1 1.5 (-435)
Katerina Siniakova – S1 -1.5 (+290)
Naomi Osaka – S1 -3.5 (+265)
Katerina Siniakova – S1 3.5 (-385)
Naomi Osaka vs Katerina Siniakova
Set Betting
Naomi Osaka 2 – 0 -139
Naomi Osaka 2 – 1 +285
Katerina Siniakova 2 – 0 +550
Katerina Siniakova 2 – 1 +625
Naomi Osaka vs Katerina Siniakova
Set Spread
Naomi Osaka -1.5 (-130)
Katerina Siniakova 1.5 (EVEN)
Naomi Osaka vs Katerina Siniakova
Alternate Set Spread
Naomi Osaka 1.5 (-1100)
Katerina Siniakova -1.5 (+600)
Naomi Osaka vs Katerina Siniakova
Total Sets
Over 2.5 (+165)
Under 2.5 (-220)
Naomi Osaka vs Katerina Siniakova
Set Correct Score
Naomi Osaka – 6 – 0 – S1 +2000
Naomi Osaka – 6 – 1 – S1 +650
Naomi Osaka – 6 – 2 – S1 +600
Naomi Osaka – 6 – 3 – S1 +340
Naomi Osaka – 6 – 4 – S1 +600
Naomi Osaka – 7 – 5 – S1 +1100
Naomi Osaka – 7 – 6 – S1 +900
Katerina Siniakova – 6 – 0 – S1 +6600
Katerina Siniakova – 6 – 1 – S1 +3300
Katerina Siniakova – 6 – 2 – S1 +1600
Katerina Siniakova – 6 – 3 – S1 +825
Katerina Siniakova – 6 – 4 – S1 +575
Katerina Siniakova – 7 – 5 – S1 +2000
Katerina Siniakova – 7 – 6 – S1 +1000
Naomi Osaka vs Katerina Siniakova
1st Set Correct Score – Any Player
6-0 +1600
6-1 +550
6-2 +450
6-3 +260
6-4 +300
7-5 +700
7-6 +600
Naomi Osaka vs Katerina Siniakova
1st Set Correct Score Groups
Naomi Osaka 6-0, 6-1 or 6-2 +240
Naomi Osaka 6-3 or 6-4 +185
Naomi Osaka 7-5 or 7-6 +500
Katerina Siniakova 6-0, 6-1 or 6-2 +1100
Katerina Siniakova 6-3 or 6-4 +500
Katerina Siniakova 7-5 or 7-6 +850
Naomi Osaka vs Katerina Siniakova
Set Exacta
Naomi Osaka WW -140
Naomi Osaka WLW +550
Naomi Osaka LWW +550
Katerina Siniakova WW +550
Katerina Siniakova WLW +1000
Katerina Siniakova LWW +1000
Naomi Osaka vs Katerina Siniakova
Tiebreak In Set
Yes – S1 +500
No – S1 -900
Naomi Osaka vs Katerina Siniakova
To Lose 1st Set & Win The Match
Naomi Osaka +550
Katerina Siniakova +1000
Naomi Osaka vs Katerina Siniakova
To Win 1st Set & Win The Match
Naomi Osaka -200
Katerina Siniakova +400
Naomi Osaka vs Katerina Siniakova
Will there be a tie-break in the match?
Yes +190
No -260
Naomi Osaka vs Katerina Siniakova
Total Match Tie Breaks
Over 1.5 +1200
Naomi Osaka vs Katerina Siniakova
Correct Score After 2 Games
Naomi Osaka 2-0 +200
Katerina Siniakova 2-0 +500
Draw 1-1 -150
Naomi Osaka vs Katerina Siniakova
Correct Score After 4 Games
Naomi Osaka 4-0 +750
Naomi Osaka 3-1 +175
Katerina Siniakova 4-0 +2500
Katerina Siniakova 3-1 +400
Draw 2-2 +135
Naomi Osaka vs Katerina Siniakova
Correct Score After 6 Games
Naomi Osaka 6-0 +2000
Naomi Osaka 5-1 +450
Naomi Osaka 4-2 +185
Katerina Siniakova 6-0 +6600
Katerina Siniakova 5-1 +1600
Katerina Siniakova 4-2 +450
Draw 3-3 +185
Naomi Osaka vs Katerina Siniakova
Lead After 4 Games
Naomi Osaka +120
Katerina Siniakova +375
Tie +135
Naomi Osaka vs Katerina Siniakova
Lead After 6 Games
Naomi Osaka -110
Katerina Siniakova +325
Tie +185
Naomi Osaka vs Katerina Siniakova
Odd/Even Total Games
Even EVEN
Odd -120
Naomi Osaka vs Katerina Siniakova
Naomi Osaka – 1st Service Game
To Hold Serve -400
To Be Broken +275
Naomi Osaka vs Katerina Siniakova
Naomi Osaka – 1st Service Game Score
Hold to Love +500
Hold to 15 +300
Hold to 30 +300
Hold to 40 +350
Broken to Love +2800
Broken to 15 +1200
Broken to 30 +850
Broken to 40 +900
Naomi Osaka vs Katerina Siniakova
Naomi Osaka – 1st Service Game – Score After 2 Points
Naomi Osaka 30-0 +135
15-15 -110
Katerina Siniakova 0-30 +500
Naomi Osaka vs Katerina Siniakova
Naomi Osaka – 1st Service Game – To Face Break Point
Yes +150
No -200
Naomi Osaka vs Katerina Siniakova
Katerina Siniakova – 1st Service Game
To Hold Serve -185
To Be Broken +140
Naomi Osaka vs Katerina Siniakova
Katerina Siniakova – 1st Service Game Score
Hold to Love +800
Hold to 15 +400
Hold to 30 +375
Hold to 40 +375
Broken to Love +1800
Broken to 15 +750
Broken to 30 +550
Broken to 40 +550
Naomi Osaka vs Katerina Siniakova
Katerina Siniakova – 1st Service Game – Score After 2 Points
Katerina Siniakova 30-0 +200
15-15 -110
Naomi Osaka 0-30 +325
Naomi Osaka vs Katerina Siniakova
Katerina Siniakova – 1st Service Game – To Face Break Point
Yes -115
No -115
Naomi Osaka vs Katerina Siniakova
First Service Break
Naomi Osaka -170
Katerina Siniakova +130
Naomi Osaka vs Katerina Siniakova
Will Katerina Siniakova Win At Least One Set?
Yes -110
No -120
Naomi Osaka vs Katerina Siniakova
Will Naomi Osaka Win At Least One Set?
Yes -1200
No +650
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US Open WTA Tennis Predictions
Tennis Pick: Alternate Total Games –
Under 20.5 (EVEN)
A $100 Bet on that Props will return $200
Tennis Odds & Props source: Bovada Sportsbook
