# Who will win a Calendar Grand Slam in 2026

> Liquidity-weighted aggregate at 27% across 20 contracts — refreshed 1 h ago.

URL: https://simplefunctions.dev/odds/who-win-calendar-grand-slam
Updated: 2026-05-03T18:35:50.990Z
Category: general
Status: active
Closes: 2026-12-31

## Headline

- Probability: 27% (liquidity-weighted across 20 contracts)
- Venue: Kalshi (20 contracts)
- 24h volume: $6K

## Bound contracts (20)

| Outcome | Price | 24h | Volume | Venue | Slug |
|---|---|---|---|---|---|
| Before 2028 | 6¢ | +1pp | $2K | kalshi | /markets/will-scottie-scheffler-win-the-grand-slam-before-2-kalshi-kxscottieslam-28 |
| Aryna Sabalenka | 64¢ | −3pp | $1K | kalshi | /markets/will-aryna-sabalenka-win-a-tennis-grand-slam-in-20-kalshi-kxwtagrandslam-26-asab |
| any man other than Carlos Alcaraz and Jannik Sinner | 57¢ | ±0 | $655 | kalshi | /markets/will-any-man-other-than-carlos-alcaraz-and-jannik-kalshi-kxatpgrandslamfield-26-field |
| 3+ Grand Slam wins | 23¢ | +1pp | $610 | kalshi | /markets/how-many-grand-slams-will-jannik-sinner-win-in-202-kalshi-kxgrandslam-jsin26-3 |
| Novak Djokovic | 13¢ | ±0 | $463 | kalshi | /markets/will-novak-djokovic-win-a-tennis-grand-slam-in-202-kalshi-kxatpgrandslam-26-ndjo |
| Grand Slam | 36¢ | +1pp | $245 | kalshi | /markets/what-will-the-announcers-say-during-blue-jays-vs-t-kalshi-kxmlbmention-26may03tormin-gran |
| Amanda Anisimova | 16¢ | — | $197 | kalshi | /markets/will-amanda-anisimova-win-a-tennis-grand-slam-in-2-kalshi-kxwtagrandslam-26-aani |
| Alexander Zverev | 13¢ | +1pp | $65 | kalshi | /markets/will-alexander-zverev-win-a-tennis-grand-slam-in-2-kalshi-kxatpgrandslam-26-azev |
| 2+ Grand Slam wins | 35¢ | ±0 | $60 | kalshi | /markets/how-many-grand-slams-will-carlos-alcaraz-win-in-20-kalshi-kxgrandslam-calc26-2 |
| Jannik Sinner | 91¢ | −1pp | $12 | kalshi | /markets/will-jannik-sinner-win-a-tennis-grand-slam-in-2026-kalshi-kxatpgrandslam-26-jsin |
| 2+ Grand Slam wins | 67¢ | +3pp | $3 | kalshi | /markets/how-many-grand-slams-will-jannik-sinner-win-in-202-kalshi-kxgrandslam-jsin26-2 |
| Mirra Andreeva | 4¢ | +1pp | $0 | kalshi | /markets/will-mirra-andreeva-win-a-tennis-grand-slam-in-202-kalshi-kxwtagrandslam-26-mand |
| 1+ Grand Slam wins | 85¢ | +1pp | $0 | kalshi | /markets/how-many-grand-slams-will-jannik-sinner-win-in-202-kalshi-kxgrandslam-jsin26-1 |
| Coco Gauff | 11¢ | −3pp | $0 | kalshi | /markets/will-coco-gauff-win-a-tennis-grand-slam-in-2026-co-kalshi-kxwtagrandslam-26-cgau |
| Daniil Medvedev | 6¢ | +1pp | $0 | kalshi | /markets/will-daniil-medvedev-win-a-tennis-grand-slam-in-20-kalshi-kxatpgrandslam-26-dmed |
| Karen Khachanov | 4¢ | +3pp | $0 | kalshi | /markets/will-karen-khachanov-win-a-tennis-grand-slam-in-20-kalshi-kxatpgrandslam-26-kkha |
| Frances Tiafoe | 3¢ | — | $0 | kalshi | /markets/will-frances-tiafoe-win-a-tennis-grand-slam-in-202-kalshi-kxatpgrandslam-26-ftia |
| Lorenzo Musetti | 4¢ | +1pp | $0 | kalshi | /markets/will-lorenzo-musetti-win-a-tennis-grand-slam-in-20-kalshi-kxatpgrandslam-26-lmus |
| Jack Draper | 4¢ | — | $0 | kalshi | /markets/will-jack-draper-win-a-tennis-grand-slam-in-2026-j-kalshi-kxatpgrandslam-26-jdra |
| Casper Ruud | 3¢ | — | $0 | kalshi | /markets/will-casper-ruud-win-a-tennis-grand-slam-in-2026-c-kalshi-kxatpgrandslam-26-cruu |

## 30-day trajectory

| Day | Aggregate |
|---|---|
| 2026-04-08 | 24 |
| 2026-04-19 | 21 |
| 2026-04-26 | 35 |
| 2026-05-03 | 37 |

_26 days of price history captured. Each row is the daily mean of intraday 5-min captures._

## What moved the line

- 2026-05-01 · Grand Slam +17pp 4→21¢ · kalshi
- 2026-04-26 · 3+ Grand Slam wins +8pp 17→25¢ · kalshi
- 2026-05-02 · Grand Slam +8pp 21→29¢ · kalshi
- 2026-04-28 · 2+ Grand Slam wins −6pp 41→35¢ · kalshi
- 2026-04-30 · 2+ Grand Slam wins −4pp 36→32¢ · kalshi

## Methodology

Probability is **liquidity-weighted** across all bound Kalshi/Polymarket contracts: Σ(price × volume) ÷ Σ(volume). 30-day trajectory uses the daily mean of intraday 5-min captures. 24h delta = today's mean − yesterday's mean. Movement events are ≥3pp daily moves in the last 7 days.

## How to use this data

- HTML: https://simplefunctions.dev/odds/who-win-calendar-grand-slam
- JSON: https://simplefunctions.dev/api/public/odds?slug=who-win-calendar-grand-slam

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