Roland Garros, Qualification ATP: Roberto Carballes Baena vs Hugo Dellien

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Market context

Polymarket is pricing Roberto Carballes Baena at 100% Yes on USDC-settled, Polygon-based conditional tokens for this Roland Garros qualifying match against Hugo Dellien, which leaves almost no spread for any late change. That full price implies the crowd expects Carballes Baena to advance, with settlement dependent on the official outcome by the end of the 7-day window rather than on pre-match expectation alone.

The match-up itself does not look like a one-sided mismatch on paper. The ATP head-to-head is 2-1 to Carballes Baena, with all three meetings on clay, and the most recent meeting went to him. Both players also came through qualifying and have already played two matches in Paris, so the relevant comparison is not fresh-court reputation but recent workload and form. Recent preview coverage noted that Carballes Baena had dropped one set in qualifying, while Dellien had won both of his matches in straight sets, which is the kind of detail that matters when a market is already pinned near certainty.

For traders, the key catalysts are straightforward: whether the match is actually played on schedule, whether there is a late court or order-of-play change, and whether either player withdraws or the fixture is postponed beyond the market’s seven-day delay rule. Live scoreboards from myKhel, SofaScore and Flashscore had the match listed for 22 May at Roland Garros, while sportsbook and exchange listings were already active, including FanDuel and Kalshi, so any interruption to that schedule would matter more than minor pre-match noise. Once play starts, the market should track the official winner rather than set scoreline or statistical dominance.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Roland Garros, Qualification ATP: Roberto Carballes Baena vs Hugo Dellien across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against 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?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in 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.