Welcome to Jimbledon
The Grand Slam tennis prediction game where smart picks, underdog bonuses, round multipliers, and bonus tennis balls lead to victory.
Join or Create a League
Create private leagues for your friends, family, or coworkers, or jump into an existing league using an invite link.
Make Picks & Assign Balls
Select winning players across Men's and Women's draws each round. Assign tennis ball multipliers to boost your most confident picks.
Climb the Leaderboard
Earn points scaled by tournament round and underdog bonuses. Track live scores and compete for the tournament title!
Draws & Round Limits
Grand Slams run across 7 rounds over two weeks. You can make picks in both the Men's Singles and Women's Singles brackets.
| Round | Tournament Stage | Max Picks (per draw) | Total Bonus Balls | Round Multiplier |
|---|---|---|---|---|
| Round 1 | Round of 128 (1R) | 6 picks | 6 balls | 1× |
| Round 2 | Round of 64 (2R) | 6 picks | 6 balls | 2× |
| Round 3 | Round of 32 (3R) | 4 picks | 4 balls | 3× |
| Round 4 | Round of 16 (4R) | 4 picks | 4 balls | 4× |
| Round 5 | Quarterfinals (QF) | 4 picks | 4 balls | 5× |
| Round 6 | Semifinals (SF) | 2 picks | 2 balls | 6× |
| Round 7 | Championship Final (F) | 1 pick | 1 ball | 7× |
🎾 How Multiplier Tennis Balls Work
You receive a pool of bonus balls for each round equal to the pick limit. You can allocate 0 to 3 balls to any single pick: 0 Balls = 1× (normal), 1 Ball = 2× (+100%), 2 Balls = 3× (+200%), 3 Balls = 4× (+300%).
The Scoring Formula
Points rewarded for a winning pick are designed to balance consistency with rewarding bold underdog predictions.
Every winning pick earns a guaranteed foundation of 100 base points.
Your player's official ranking number is added to base points (e.g. Rank #40 adds +40 pts).
If your player is ranked lower than their opponent (higher number), you gain the entire ranking gap as bonus points!
Points scale by tournament round (1× to 7×) and multiply by (1 + balls assigned).
Comparison Examples
- • Base: 100
- • Rank Bonus: +3
- • Underdog Bonus: +0 (Favorite)
- • Round Multiplier: ×1
- • Ball Multiplier: ×1 (0 balls)
- • Base: 100
- • Rank Bonus: +386
- • Underdog Bonus: +346 (386 - 40)
- • Subtotal: 832
- • Multiplier: ×1 (Round) × 3 (2 balls)
Interactive Points Calculator
Test out different match scenarios and see how points calculate in real time.
Key Game Features
⏰ Round Locks
Each round has a strict lock deadline (normally 11:00 AM UK time on the first day of that round). Once locked, picks and ball assignments cannot be edited.
🤖 Autopicker
Short on time? Tap the Autopicker button in your league's pick arena to automatically distribute any remaining picks and multiplier balls before the round deadline.
🔁 Auto-Carry Forward
If a player you picked wins their match, they will automatically carry forward into your picks for the next round so you never miss out if you forget to check in.
🏆 League Analytics
Track fun awards in your league dashboard, including Most Adventurous Pick, Biggest Winner, and the dreaded Most Painful Loss!
Frequently Asked Questions
Can I change my picks after submitting them?
What happens if a player retires or gets a walkover?
Can I join multiple leagues for the same tournament?
How do I invite friends to my league?
Ready to make your Grand Slam predictions?
Join a league today and challenge your friends in the ultimate fantasy tennis arena.