National Bank Open: Rafael Jodar vs Arthur Fils

Platform comparison

Market context

Rafael Jodar and Arthur Fils are due to meet again at the National Bank Open, with the market sitting near a slight lean to **Jodar** at 54% implied probability. The price is broadly consistent with a rivalry that has already produced split results across surfaces this year: Fils won their Barcelona meeting on clay in April, while Jodar beat him in straight sets on hard courts in Washington in late July.[6][12]

That sequence matters because it frames this as less a name-value mismatch than a surface-and-form question. Fils has the higher established ATP profile and has been rated around the top 25 in recent listings, but Jodar has already shown he can absorb Fils’ pace and win extended baseline exchanges on hard courts.[1][2][12] Comparable head-to-head markets in tennis tend to move quickly when the most recent meeting was decisive, especially when it came on the same surface and within weeks of the rematch.[6][12]

The main catalyst is whether the match actually goes ahead as scheduled and whether either side reports any late withdrawal, because the market resolves to 50-50 if it is not played or is pushed beyond the settlement window. On the tennis side, traders will focus on confirmed order of play, official draw updates and any injury or travel notes before the scheduled start, with recent reports already highlighting the Washington result as the key recent reference point for this pairing.[12][13]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks National Bank Open: Rafael Jodar vs Arthur Fils across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Election Predictions UK provide a 0%-fee route into the same order book.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

UK Frequently Asked Questions

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Election Predictions UK route into the same order book at 0% fees.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

Are political prediction markets legal in my country?

It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.