Wimbledon WTA: Caty McNally vs Elena Rybakina

Platform comparison

Market context

The contract for Caty McNally versus Elena Rybakina at Wimbledon currently trades at a 0% implied probability for McNally advancing, reflecting the market’s near-total confidence in Rybakina’s victory. On Polymarket, this conditional token is priced in USDC on the Polygon chain, where the on-chain mechanics dictate that the position resolves to “Rybakina” if she wins the match, to “McNally” if McNally advances, or to a 50-50 fair price if the match is cancelled before a ball is played or delayed beyond seven days without a winner [2].

Historically, similar WTA grass-court matchups have shown that when a player holds a significant ranking advantage and recent form, the market quickly discounts the lower-ranked opponent. In this case, Rybakina is ranked WTA 2 while McNally sits at WTA 50, and Rybakina previously defeated McNally in three sets at the China Open, winning the first set from three set points [7]. Tennis Tonic’s pick for this match is Rybakina to win in two sets, with initial odds of 1.122 for Rybakina versus 6.1 for McNally, reinforcing the 0% pricing for McNally [1].

Traders should monitor the official WTA schedule for any withdrawal announcements or injury updates before the match begins at 10:00 UTC on 2 July, as a pre-match withdrawal would trigger a fair-price resolution [2]. Additionally, live score feeds from Sofascore and Flashscore will confirm whether the match starts, which is the critical on-chain trigger for the conditional token to resolve based on match outcome rather than fair price [4][6]. Any delay beyond the two-week window would keep the market open until the rescheduled match concludes, per Kalshi’s rules for postponed events [2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.