Football
EPL · La Liga · Serie A · Bundesliga · Ligue 1 · UCL · Europa · Copa Libertadores · MLS · Eredivisie. 1×2, Asian handicap (¼ steps), O/U, BTTS, corner and card markets, 50+ player props per fixture.
Pre-match · Live · Esports
Bet Sharper. Cash Out Faster. Pay Zero Margin Tax.
One wallet for casino and sportsbook. Sub-300ms in-play odds, partial cash-out from $5, identity checks waived below $2,000 daily, and 40% of every losing week refunded every Monday. Bet the line, not the operator.
Champions League · LiveLive Now
Real Madrid vs. Arsenal
Real1.92
Draw3.40
Arsenal4.10
NBA · Pre-matchTip-off 02:00 UTC
Lakers @ Celtics
Spread+4.5
TotalO 224.5
300 ms
Live-odds refresh
30+
Sports & esports
40%
Weekly loss rebate
3 min
Median payout
Featured event · F1
Bet on Miami GP
Live ticker
Live action right now
A snapshot of in-play markets refreshing on the same WebSocket feed your bet slip uses. Numbers below are illustrative; live odds in-game move every few seconds.
Football
Inter Miami vs. Orlando City
2-1 · 71'
11.55
X4.20
26.50
Tennis
Sinner vs. Alcaraz
Set 3 · 4-3
P11.85
,,
P21.95
Esports
FaZe vs. NaVi (CS2)
Map 2 · 12-9
FaZe1.45
,,
NaVi2.70
MMA
Topuria vs. Volkanovski
Round 2
F11.62
,,
F22.30
Markets
Every league players actually follow
From Champions League finals to a Tuesday-night ECS map. The full odds tree is open the moment you tap a sport, and every market settles to the same wallet you use for slots and originals.
Basketball
NBA · EuroLeague · NCAA · WNBA · Liga ACB. Quarter spreads, alt-totals, double-double and triple-double props, MVP and Conference futures, live-line spreads.
Tennis
ATP · WTA · all four Grand Slams · Challenger and ITF feeds. Set and game handicaps, tiebreak markets, retirement protection on outright winners and game props.
MMA & Boxing
UFC · ONE · Bellator · PFL · top-tier boxing cards. Round bets, method-of-victory, judges' point cards, 12 rounds vs. distance props, prop builders.
Esports
CS2 · Dota 2 · LoL · Valorant · Rainbow Six · StarCraft. Map outrights, first blood, total tower kills, pistol-round winner, map-by-map series and tournament outrights.
Cricket · F1 · Golf · Rugby · Hockey
IPL · T20I · Tests · ODIs · BBL. Formula 1 outrights, podium, fastest lap. Golf majors, top-10, head-to-head. NHL, KHL, AFL, NRL, MLB and NPB.
Why bet here
Built for bettors who read their tickets
Real cash-out, not a teaser
Partial cash-out from $5, full cash-out one tap. Available on every market that has an open price, including in-play parlays and same-game multis.
40% weekly sport rebate
End the week down on sports? Forty percent of net loss is back in your wallet by 06:00 UTC Monday. No rollover, no max-cashout cap, no opt-in.
Sub-300 ms live feed
Live odds refresh on a sub-300ms WebSocket feed with no artificial accept-delay. The price you tap is the price your bet lands at, every time.
Margin you can verify
Top football moneylines stay inside a ~3.5% book margin. Basketball and tennis under ~4%. Every fixture page publishes the implied margin so you can shop the line.
Weekly loss rebate
40% back on every losing sport week
Every Monday at 06:00 UTC, forty percent of last week's net negative on the sportsbook is credited back as withdrawable crypto. No tier requirement, no wagering, no max-cashout, no opt-in. The credit covers pre-match, live, parlays, same-game multis and cash-outs at any stake.
Bet builder
Build it, price it, ship it
Same-game multis and player-prop builders are first-class in the slip, not a side menu. Combine spread, total and a player prop on one fixture, lock the price, ship.
01
Stack legs
Drop spreads, totals, anytime scorer, alt-lines, corner counts and player threshold markets into one slip.
02
Live re-price
The slip re-prices every 200ms as in-play markets move. Lock a price with one tap before kick-off or mid-match.
03
Cash-out clean
Partial cash-out from $5; full cash-out is a single tap. The cash-out price is published next to the live one, no spread games.
Sportsbook FAQ
What is the book margin like compared to a typical operator?
Top football and basketball moneylines run inside ~3.5% margin, tennis and MMA under ~4%, esports between 4-5%. Every fixture page publishes the implied margin in the footer so you can shop the line.
How does cash-out actually work?
Cash-out is available on every market that has an open price (pre-match and in-play). Partial cash-out from $5 lets you bank some profit and let the rest ride; full cash-out closes the ticket at the published price. There is no spread between the cash-out price and the live one.
Are esports markets the same as sportsbook?
Yes, same wallet, same cash-out engine, same KYC posture. CS2, Dota 2, LoL, Valorant and Rainbow Six get full map-by-map odds, first-blood, pistol round and tournament outrights. Live latency is identical to football and basketball.
How is the 40% weekly rebate calculated?
Net negative on the sportsbook (pre-match + live + parlays + same-game multis, including cash-outs and voids) over the rolling Mon-Sun week. Forty percent of that number is credited as withdrawable crypto by 06:00 UTC Monday morning. No tier gate, no opt-in.
Are bets paid out instantly after settlement?
Yes. Every market settles within seconds of the official feed (pre-game outrights settle within five minutes of the result being marked official). Withdrawals from the sportsbook follow the same pipeline as casino, with a median 3-minute on-chain confirmation.
Is there a stake limit?
Default per-bet limit is $25,000 on outright moneylines and $5,000 on player props, with $250,000 daily withdrawal cap. VIP Platinum and Diamond have raised default caps and can request bespoke limits via host.
How a sportsbook should actually feel
A Sportsbook Engineered Around Closing Lines, Not Marketing Copy
Most online sportsbooks are vehicles for marketing, the price you see is the result of a margin calculation that protects retention KPIs first and the bettor never. Duel's sportsbook is built off the inverse: the price is the closing-line forecast, the margin is published, and every market that resolves shows the seed of the data feed it settled on. The article below explains the trading desk, the live engine, the bonus structure and the limits, in order.
How the trading desk actually prices a market
Duel runs a market-maker pool feed for top-tier football, tennis and basketball, with manual oversight from a six-person trading desk on volatile markets (mid-major MMA cards, esports tournament outrights). Pre-match prices stay open within 35 to 45 seconds of kick-off; the model used to compress that window is identical to the one used by professional syndicates the desk respects. Margins on Champions League full-time results sit at ~3.5%, the EPL at ~3.7%, ATP/WTA Grand Slam main draws at ~3.9%, top UFC cards at ~4.2% and tier-1 esports tournament outrights at ~4.5%. Numbers fluctuate within a 30 bp band and are written into the fixture footer in real time.
Live odds, accept-delay and the 300 ms number
In-play odds refresh on a sub-300 ms WebSocket feed with zero artificial accept-delay, the slip is locked to the price the bettor tapped. If the price moves between tap and confirm, the slip rejects rather than re-quoting at a worse number, the standard accept-on-bet-up behaviour stays opt-in. The architecture does not run trader-paused markets longer than the underlying feed pause, and pause windows on top fixtures are published in the bet history so any disputed bet can be reconstructed second-by-second.
Cash-out math, partial cash-out and parlays
Cash-out is offered on every market with an open price. The cash-out price is the slip's current expected value at the live odds, with no operator spread on top, the same number a competing book would arrive at if their margin were stripped. Partial cash-out from $5 lets the bettor bank a portion of profit and run the rest; the remaining stake stays at the original odds. Parlays and same-game multis cash out leg-by-leg, every time the underlying market reprices.
The 40% sport rebate, in plain numbers
The rebate fires on net negative weekly result across the entire sportsbook (pre-match, live, parlays, same-game multis, including cash-outs and voids). Forty percent of the negative number is paid as withdrawable crypto by 06:00 UTC Monday morning. There is no tier gate, no rollover requirement, no max-cashout cap, no opt-in. A bettor who finishes the week up gets nothing that week, which is the point: the rebate is loss insurance, not a marketing handout.
Limits, KYC and how the desk treats sharp action
Default per-bet ceilings are $25,000 on outright moneylines, $5,000 on player props and $1,000 on first-half/last-five-minutes specials. Daily withdrawal cap is $250,000 with no rolling weekly ceiling. KYC fires above $2,000 in daily withdrawals or on automated risk flags (mismatched IP, chain-mixer hops). Sharp accounts are not auto-restricted, the desk publishes a written policy on bet allocation rather than throttling, and any throttle decision can be appealed to a human trader within 24 hours.