Who bet on "US Open ATP: Ben Shelton vs Carlos Alcaraz" — Polymarket whale activity
18 whale wallets moved $698K through this market in the 30 days to 2026-09-09, across 25 trades of $10,000 or more. 55% of their buy volume went to Ben Shelton, at a volume-weighted entry of 35¢. The market last traded Ben Shelton at 99.9¢.
- $698K
- whale volume
- 18
- whale wallets
- 25
- fills ≥ $10K
- 23%
- top wallet share
where the whale money went
Ben Shelton
9 wallets bought at an average of 35¢
last traded 99.9¢ on 2026-09-09
Carlos Alcaraz
9 wallets bought at an average of 75¢
last traded 0.1¢ on 2026-09-09
how to read this
Whale money is genuinely split here. Ben Shelton took 55% of the buy volume and Carlos Alcaraz took 45%, so large wallets are on both sides of this question. There is no whale consensus to follow.
Between those entries and the last print the market moved 65 cents toward the side whales bought. That is the distance between two observed prices, not a profit: we do not know which of these wallets are still holding.
The market has since converged — Ben Shelton last traded at 99.9¢ on 2026-09-09 — so this page is a record of how large wallets positioned while the question was still open.
biggest whale fills (8)
| date | wallet | side | outcome | size | price |
|---|---|---|---|---|---|
| 2026-09-09 | 0xc2e7…be51 | BUY | Ben Shelton | $163K | 24¢ |
| 2026-09-09 | 0x78be…bde0 | BUY | Carlos Alcaraz | $85K | 74¢ |
| 2026-09-08 | 0x979f…4032 | BUY | Carlos Alcaraz | $83K | 78¢ |
| 2026-09-08 | 0xf559…f462 | BUY | Carlos Alcaraz | $50K | 78¢ |
| 2026-09-09 | 0x18aa…f959 | BUY | Ben Shelton | $25K | 34¢ |
| 2026-09-09 | 0x18aa…f959 | BUY | Ben Shelton | $25K | 34¢ |
| 2026-09-09 | 0x18aa…f959 | BUY | Ben Shelton | $25K | 34¢ |
| 2026-09-09 | 0x2c33…0563 | BUY | Ben Shelton | $23K | 45¢ |
Each wallet links to its transaction on Polygonscan — every number on this page is checkable against the chain.
markets with similar flow
This market is one of 300 markets we track whale flow on; the week's biggest moves across all of them are on the whale index.
Whether this kind of flow actually predicts outcomes is a separate question, and we tested it on hundreds of resolved markets — read the backtest. The short version: whale flow confirms, it does not forecast.
Not financial advice · on-chain data, may be delayed · snapshot of 2026-09-14 · below our data bar, excluded from search indexing
Free tier covers the whale endpoints used on this page.