TOTAL VOLUME:

$134.2b

24H VOL:

$130,522,377

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,438,389,636

404,028

Markets across

30,214

events

MATCHED EVENTS:

2,681

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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M25 Sintra: Joao Mendes vs Duarte Melo
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M25 Sintra: Joao Mendes vs Duarte Melo

Volume:
N/A

M25 Sintra: Joao Mendes vs Duarte Melo

 - Polymarket

M25 Sintra: Joao Mendes vs Duarte Melo - Polymarket

1W

News

Positive

Negative

Neutral

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Vol.

·

Resolved Sep 13, 2026

Closed: Sep 13, 3:05 PM EST

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Polymarket

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

M25 Sintra: Joao Mendes vs Duarte Melo

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

Completed Match

100%
Yes 100¢No 0¢
19¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

M25 Sintra: Joao Mendes vs Duarte Melo Set 1 Winner

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

M25 Sintra: Joao Mendes vs Duarte Melo Set 2 Winner

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

M25 Sintra: Joao Mendes vs Duarte Melo Total Sets: O/U 2.5

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

M25 Sintra: Joao Mendes vs Duarte Melo Set 1 O/U 8.5

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

M25 Sintra: Joao Mendes vs Duarte Melo Set 1 O/U 9.5

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

M25 Sintra: Joao Mendes vs Duarte Melo Set 1 O/U 10.5

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

M25 Sintra: Joao Mendes vs Duarte Melo Set 2 O/U 8.5

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

M25 Sintra: Joao Mendes vs Duarte Melo Set 2 O/U 9.5

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

M25 Sintra: Joao Mendes vs Duarte Melo Set 2 O/U 10.5

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

M25 Sintra: Joao Mendes vs Duarte Melo Match O/U 21.5

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

M25 Sintra: Joao Mendes vs Duarte Melo Match O/U 22.5

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

M25 Sintra: Joao Mendes vs Duarte Melo Match O/U 23.5

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

M25 Sintra: Joao Mendes vs Duarte Melo Set Handicap +/-1.5

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

M25 Sintra: Joao Mendes vs Duarte Melo Set Handicap +/-1.5

0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
Total markets: 16

Description

This market refers to the tennis match between Joao Mendes and Duarte Melo in the M25 Sintra, Qualifying, originally scheduled for September 13, 2026 at 6:30AM ET. This market will resolve to 'Joao Mendes' if Joao Mendes advances against Duarte Melo. This market will resolve to 'Duarte Melo' if Duarte Melo advances against Joao Mendes. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 27, 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.

Polymarket

This market refers to the tennis match between Joao Mendes and Duarte Melo in the M25 Sintra, Qualifying, originally scheduled for September 13, 2026 at 6:30AM ET. This market will resolve to 'Joao Mendes' if Joao Mendes advances against Duarte Melo. This market will resolve to 'Duarte Melo' if Duarte Melo advances against Joao Mendes. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 27, 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.

Frequently asked questions

Often, prediction market odds offer a different perspective than those found at traditional sportsbooks. This market reflects the collective wisdom of traders, who may incorporate information not readily available to sportsbook oddsmakers, or weigh different factors differently. Sportsbooks typically set odds to maximize profit, factoring in a house edge, while this market aims to reflect the true probability of the outcome as perceived by participants. Discrepancies can arise due to differing opinions, information access, and risk appetites, offering potential value for informed traders.

On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in the outcome. The price of these shares directly reflects the implied probability of the event occurring. As more traders buy shares, the price increases, indicating a higher perceived chance of that outcome. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market price fluctuates based on supply and demand, driven by new information and changing sentiment among traders. This dynamic pricing allows the market to quickly adapt to new developments and provide a real-time assessment of the likely result.

This market resolves around Sep 20, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The resolution will be based on the official result of the Joao Mendes vs Duarte Melo match, as declared by the governing body of the competition. The platform will verify the outcome against established sources to ensure accuracy and transparency. Traders who correctly predicted the result will be entitled to a payout based on the final market price at resolution.

Several factors could influence the price of this market leading up to Sep 20, 2026. Any news regarding player form, injuries, or changes in strategy could significantly impact trader sentiment. Unexpected results in other matches involving these players, or shifts in public opinion based on expert analysis, could also drive price movements. Major upsets or surprising performances in related events could also cause traders to reassess their probabilities, leading to increased volume and price volatility in this market.