TOTAL VOLUME:

$134b

24H VOL:

$107,351,958

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,416,970,024

400,720

Markets across

30,097

events

MATCHED EVENTS:

2,633

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

BETA
Dashboards
Insights
Indices
Tour
All
Trending
Breaking
New
Ending Soon
Politics
Sports
Crypto
Companies
Elections
Financials
Economics
Other
Entertainment
Science and Technology
ITF Harmon: Hiromasa Koyama vs Colin Sinclair
polymarket

ITF Harmon: Hiromasa Koyama vs Colin Sinclair

Volume:
$4,373

ITF Harmon: Hiromasa Koyama vs Colin Sinclair

 - Polymarket

ITF Harmon: Hiromasa Koyama vs Colin Sinclair - Polymarket

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Jun 5, 2026

Closed: Jun 11, 10:15 PM EST

polymarket

Polymarket

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

ITF Harmon: Hiromasa Koyama vs Colin Sinclair

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$4,373
N/A
N/A
N/A
Settled
Yes
polymarket

Completed Match

View
100%
Yes 100¢No 0¢
0.1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
Total markets: 2

Description

This market refers to the tennis match between Hiromasa Koyama and Colin Sinclair in the ITF Men Harmon, originally scheduled for June 4, 2026 at 10:15PM ET. This market will resolve to 'Hiromasa Koyama' if Hiromasa Koyama advances against Colin Sinclair. This market will resolve to 'Colin Sinclair' if Colin Sinclair advances against Hiromasa Koyama. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.

Frequently asked questions

The ITF Harmon: Hiromasa Koyama vs Colin Sinclair dashboard on Polymarket tracks real-time odds and trading activity for this professional tennis match. You can monitor the current implied probability for each player, view historical price movements, and observe 24-hour trading volume. The dashboard displays how market participants are pricing the likelihood of each outcome as the event approaches, providing a live window into collective expectations for this ITF Harmon tournament matchup.

Prediction market odds on Polymarket and traditional sportsbook odds often diverge due to different participant bases and incentive structures. Sportsbooks set odds to balance liability and extract margin, while prediction markets reflect real-time consensus from traders risking capital. For the Koyama versus Sinclair match, comparing Polymarket implied probabilities to major sportsbooks can reveal whether the market is pricing in information that oddsmakers have not yet fully reflected, or vice versa.

On Polymarket, the ITF Harmon: Hiromasa Koyama vs Colin Sinclair event is priced through an automated market maker that converts trader orders into real-time probabilities for each outcome. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Prices move continuously as traders buy and sell shares, with the current top outcome reflecting the highest implied probability. Volume and liquidity on Polymarket determine how efficiently prices adjust to new information about player form, injury status, or other match-relevant developments.

The ITF Harmon: Hiromasa Koyama vs Colin Sinclair market resolves on Jun 12, 2026. Resolution is determined by the official result of the match as recorded by the ITF and confirmed through standard sports data sources. The market will settle based on which player wins the match, with no ambiguity regarding walkovers, retirements, or disqualifications—all governed by ITF rules and tournament protocols.

Several factors could shift odds for the Koyama versus Sinclair match. Recent tournament results and head-to-head records will influence trader sentiment as the event nears. Injury announcements, withdrawal news, or changes in player ranking or form could trigger sharp price moves. Court surface conditions, weather forecasts, and any last-minute lineup changes announced by the ITF may also prompt traders to reassess probabilities. Media coverage and expert commentary can amplify or dampen conviction in either player.