Newport: Iryna Shymanovich vs Mary Stoiana

Platform comparison

Market context

The underlying event is the WTA 125K Newport Round 2 match between Iryna Shymanovich and Mary Stoiana, scheduled for 11:00 AM ET on 9 July 2026, where the market resolves to the player who advances. With a crowd-implied probability of 0% YES for Shymanovich winning, the consensus heavily favours Stoiana, yet historical head-to-head data suggests Shymanovich holds a slight edge in past encounters, having won more matches against Stoiana overall[3]. Comparable cases in Newport Challengers show that when a lower-ranked player leads the head-to-head record, the market often overreacts to recent form, creating value spots for contrarian angles on the underdog despite the 0% pricing.

Traders should monitor the official tournament draw confirmation and any injury updates from the WTA, as Newport’s tight schedule means delays or cancellations could trigger the 50-50 resolution clause if the match exceeds seven days without a winner[5]. Recent coverage from Tennis.com highlights live broadcast details and statistics for this specific Round 2 clash, indicating that both players are confirmed and the match is imminent[5]. The key catalyst is whether Stoiana’s recent ITF W100 performance against Shymanovich in April 2025, where she competed in a high-stakes tie, translates to dominance in this WTA 125K setting, or if Shymanovich’s head-to-head advantage resurfaces as the decisive factor[4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Newport: Iryna Shymanovich vs Mary Stoiana across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win, which mirrors the Polymarket order book at 0% fees.

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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 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.