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US Open ATP: Rei Sakamoto vs Frances Tiafoe
polymarket

Who will win Rei Sakamoto vs Frances Tiafoe?

Volume:
$399,007

Completed Match

 - Polymarket

Completed Match - Polymarket

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Sep 3, 2026

Closed: Sep 2, 10:20 PM EST

polymarket

Polymarket

View
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
polymarket

Completed Match

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$2,888
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set Handicap +/-1.5

View
100%
Yes 100¢No 0¢
1¢
N/A
$844
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set Handicap +/-2.5

View
100%
66%
Yes 100¢No 0¢
0.9¢
N/A
$255
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Game Spread +/-4.5

View
100%
44%
Yes 100¢No 0¢
0.9¢
N/A
$188
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe

View
0%
22%
Yes 0¢No 100¢
—
N/A
$386,633
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Total Sets: O/U 3.5

View
0%
Yes 0¢No 100¢
—
N/A
$2,400
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 2 Winner

View
0%
88%
Yes 0¢No 100¢
—
N/A
$1,939
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 1 Winner

View
0%
Yes 0¢No 100¢
—
N/A
$1,582
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Match O/U 36.5

View
0%
Yes 0¢No 100¢
—
N/A
$833
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 3 Winner

View
0%
98%
Yes 0¢No 100¢
—
N/A
$733
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Match O/U 38.5

View
0%
Yes 0¢No 100¢
—
N/A
$349
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 1 O/U 9.5

View
0%
87%
Yes 0¢No 100¢
—
N/A
$269
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set Handicap +/-1.5

View
0%
2%
Yes 0¢No 100¢
—
N/A
$63
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Total Sets: O/U 4.5

View
0%
25%
Yes 0¢No 100¢
—
N/A
$32
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 2 O/U 8.5

View
100%
3%
Yes 100¢No 0¢
1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 1 O/U 8.5

View
100%
17%
Yes 100¢No 0¢
0.1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 2 O/U 9.5

View
100%
3%
Yes 100¢No 0¢
0.1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set Handicap +/-2.5

View
0%
5%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 4 Winner

View
50%
Yes 50¢No 50¢
—
N/A
N/A
N/A
N/A
N/A
Settled
No
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Match O/U 40.5

View
0%
50%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 2 O/U 10.5

View
100%
3%
Yes 100¢No 0¢
0.1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 1 O/U 10.5

View
0%
51%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 3 O/U 8.5

View
100%
3%
Yes 100¢No 0¢
1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 3 O/U 9.5

View
100%
3%
Yes 100¢No 0¢
20¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open ATP: Rei Sakamoto vs Frances Tiafoe Set 3 O/U 10.5

View
100%
2%
Yes 100¢No 0¢
20¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
Total markets: 25 of 28

Intro

This market tracks whether a total of over 9.5 games will be played in the fourth set of the Rei Sakamoto versus Frances Tiafoe match at the US Open ATP tournament. Currently, Polymarket gives a 100.0% probability to “Sakamoto vs. Tiafoe: Set 4 Games O/U 9.5”. The resolution source for this market is the official ATP Tour website at https://www.atptour.com/en/scores/current. Keep an eye on the match itself, originally scheduled for September 2, 2026 at 11:00AM ET, as the outcome will depend on the number of games played in the fourth set during that fixture.

Polymarket

This market refers to the tennis match between Rei Sakamoto and Frances Tiafoe in the US Open ATP, originally scheduled for September 2, 2026 at 11:00AM ET. This market will resolve to 'Rei Sakamoto' if Rei Sakamoto advances against Frances Tiafoe. This market will resolve to 'Frances Tiafoe' if Frances Tiafoe advances against Rei Sakamoto. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 16, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.

Frequently asked questions

On Polymarket, the Sakamoto vs Tiafoe US Open match market dashboard tracks real-time odds, price history, and 24-hour volume for this market. It shows how traders on Polymarket are pricing the contest as it approaches, with updates reflecting shifts in sentiment or new information. The dashboard highlights the top outcome’s chance percentage and displays trading volume of $396,661 over the last day, giving users a live view of market dynamics for the Sakamoto vs Tiafoe US Open match market.

This market resolves around Sep 9, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The result is based on the official match conclusion, and the platform will update the market accordingly. Traders should monitor reputable sports news sources for confirmed results, as the market settles automatically once the match is officially over and the winner is announced.

Injuries, weather delays, or changes in player form could shift this market as the event approaches. Media coverage, pre-match betting trends, and analyst predictions may also influence trader sentiment. Any update affecting the perceived likelihood of each player winning — whether from practice sessions, head-to-head history, or tournament conditions — can cause rapid price swings. Keeping an eye on official tournament announcements and player updates is key to anticipating moves in this market.