Learn
Learn tennis trading
Plain guides to trading tennis on prediction markets like Polymarket. How the prices work, why they jump, how to get in and out of a match, and what can go wrong. I write these for people who know a bit about tennis and want to understand the market side. Everything here can be practised free on the 77 Tennis demo.
Start hereNew to this? Read this one first.
LearnHow tennis prices work, and what moves them.
- Learn
How tennis prices work: why 62¢ means a 62% chance
Price equals probability. Here's why, and how it moves with every point.
7 min read - Learn
Tennis trading vs tennis betting: what's actually different
Exits, prices vs odds, costs and risk, compared side by side.
6 min read - Learn
What happens if a tennis player retires mid-match?
Retirements, walkovers and suspended matches, and how the market pays out.
6 min read - Learn
Why the price jumps on a break of serve (and when it overreacts)
How much a break should move the price, and when the market overdoes it.
6 min read - Learn
How much do tennis prices really swing? What 150,000 live minutes show
Real market data: how big moves are, how often big swings happen, and how often they reverse.
7 min read - Learn
How to trade tennis on Polymarket: step by step
Find the market, read the price, buy, watch, sell, and know what happens at the end.
8 min read
StrategiesSimple, step-by-step ways to trade a match, with the risks spelled out.
- Strategies
Trading the break of serve: a simple tennis strategy, step by step
A step-by-step way to trade breaks, with exits and the risks spelled out.
7 min read - Strategies
Take-profit and stop-loss for tennis trading: how to set them
Where to put your exits, why stops fill late, and simple rules to start with.
6 min read
Tournaments & surfacesWhy the same score is worth a different price on clay, grass and hard courts.
- Tournaments & surfaces
Clay, grass, hard court: how the surface changes tennis prices
Why the same score is worth a different price on each surface.
6 min read - Tournaments & surfaces
ATP Finals 2026 trading guide
Round robin then knockouts, top-eight prices, indoor serving, and dead rubbers.
7 min read
Free toolsQuick calculators. No sign-up needed.
- Free tool
Tennis odds converter
Turn a price in cents into a probability and every common odds format.
Free, no sign-up - Free tool
Tennis trading profit calculator
See your shares, profit or loss and break-even price before you trade.
Free, no sign-up - Free tool
Tennis win-chance calculator
Type in the score and get each player's estimated chance of winning the match.
Free, no sign-up
Demo only. 77 Tennis uses demo money with no cash value. Nothing here is financial or betting advice. Prices come from Polymarket's public tennis markets, and I'm not affiliated with Polymarket. Prediction markets aren't legal everywhere, so check the rules where you live. If trading stops being fun, stop.