National Bank Open: Jakub Mensik vs Ben Shelton

Platform comparison

Market context

The National Bank Open in Montreal hosts a first-round singles match between Czech prospect Jakub Mensik and American talent Ben Shelton, scheduled for 11 August 2026. Mensik, ranked in the top 100, has shown steady improvement on the ATP circuit with consistent performances at mid-tier events. Shelton, son of former world number one John McEnroe's contemporary, carries higher seeding expectations and has competed regularly in ATP 250 tournaments. The match outcome determines advancement to the second round of a tournament that typically draws strong European and North American participation.

Historical precedent suggests early-round upsets at the National Bank Open occur at roughly 35–40% frequency when the lower-ranked player faces a seeded opponent, though Mensik's recent form and surface preference (hard courts favour his game) narrow that margin. Head-to-head records between rising Czech and American players at this level show competitive depth rather than dominant patterns. Current zero probability reflects either incomplete market liquidity or strong backing for Shelton's advancement, a signal worth monitoring as deposit flows and withdrawal rails (SEPA transfers, Klarna settlements, USDC on-chain redemptions) activate closer to match week.

Watch for injury updates or withdrawal announcements in the seven days preceding 11 August, which would trigger the 50-50 resolution clause. Tournament draws typically confirm 48 hours before play begins; any schedule shifts affecting player preparation warrant tracking. Funding depth in this market will likely increase once major deposit corridors activate, particularly SEPA and Klarna payment rails that serve UK and European traders.

Methodology

This page compares National Bank Open: Jakub Mensik vs Ben Shelton with a focus on payment rails and deposit friction. Polymarket accepts USDC on Polygon only; Kalshi only ACH/Plaid (US only); Betfair card/SEPA in EU/UK; Manifold no deposit. Polymarket Klarna UK additionally offers Klarna and SOFORT as fiat on-ramps to USDC. Live odds reflect the Polymarket order book.

Resolution & payout

Settlement path determines payout latency. Polymarket settles on-chain (USDC, minutes). Broker frontends like Polymarket Klarna UK add Klarna/SOFORT as fiat withdrawal options with T+1 processing. Kalshi: USD via ACH (T+1 to T+3). Betfair: local currency via card/SEPA (T+1 to T+5).

UK Frequently Asked Questions

How does Klarna deposit work on Polymarket Klarna UK?

You enter the deposit amount in EUR/GBP, choose Klarna as the method, run through Klarna's standard authentication (Pay Later or Direct Bank Transfer), and Polymarket Klarna UK converts internally to USDC for the Polymarket order book. Processing: typically under 30 minutes.

What does SOFORT cost as a deposit method?

Polymarket Klarna UK charges no fees for SOFORT. The only cost is the internal FX spread (typically <1%) on EUR→USDC conversion. SOFORT itself has no end-user fees — the platform absorbs acquirer costs.

Can UK traders use Klarna to deposit on Polymarket?

Polymarket does not natively accept Klarna. To fund a Polymarket account from the UK, you must first purchase USDC via a crypto exchange (Coinbase UK, Kraken) or Revolut, then transfer to a Polygon-compatible wallet. Some third-party on-ramps (MoonPay, Transak) accept UK debit cards and may support Klarna buy-now-pay-later for crypto purchases.

What payment methods can UK users use for Polymarket?

UK traders typically use: (1) Coinbase UK or Kraken — buy USDC with GBP debit card or bank transfer; (2) Revolut — buy crypto and send to wallet; (3) MoonPay or Transak — Visa/Mastercard UK debit card directly to USDC on Polygon. Standard GBP-to-USDC conversion fees range from 0.5–2.5%.

How long do Polymarket withdrawals take for UK users?

Polymarket withdrawals to your Polygon wallet are instant (on-chain). Converting USDC back to GBP via Coinbase UK or Kraken typically takes 1–3 business days for bank transfer, or near-instant for Revolut. Polygon gas fees are minimal (<$0.01 per transaction).