Who bet on "Cincinnati Open: Katerina Siniakova vs Jessica Bouzas Maneiro" — Polymarket whale activity
4 whale wallets moved $68K through this market in the 30 days to 2026-08-16, across 4 trades of $10,000 or more. 100% of their buy volume went to Jessica Bouzas Maneiro, at a volume-weighted entry of 50¢. The market last traded Jessica Bouzas Maneiro at 3¢.
- $68K
- whale volume
- 4
- whale wallets
- 4
- fills ≥ $10K
- 52%
- top wallet share
where the whale money went
Jessica Bouzas Maneiro
2 wallets bought at an average of 50¢
last traded 3¢ on 2026-08-16
Katerina Siniakova
0 wallets bought nothing here (whale flow was sells only)
last traded 99.9¢ on 2026-08-16
how to read this
One wallet drives this market: 0xbb5f…2e21 accounts for 52% of all whale buy volume ($21K). That makes this one desk's position rather than a crowd view — the concentration is the story, and it means a single actor's change of mind would move the whole picture.
Between those entries and the last print the market moved 47 cents against 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 — Katerina Siniakova last traded at 99.9¢ on 2026-08-16 — so this page is a record of how large wallets positioned while the question was still open.
biggest whale fills (4)
| date | wallet | side | outcome | size | price |
|---|---|---|---|---|---|
| 2026-08-16 | 0xbb5f…2e21 | BUY | Jessica Bouzas Maneiro | $21K | 60¢ |
| 2026-08-16 | 0xfe78…0319 | BUY | Jessica Bouzas Maneiro | $19K | 40¢ |
| 2026-08-16 | 0x5f65…2036 | SELL | Jessica Bouzas Maneiro | $18K | 71¢ |
| 2026-08-16 | 0xf9d6…730a | SELL | Katerina Siniakova | $10K | 99.9¢ |
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 2026-08-17 · below our data bar, excluded from search indexing
Free tier covers the whale endpoints used on this page.