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ATPCHALLENGER·Mon 6:30 PM ET

Anton Shepp vs Jack Kennedy

Jack Kennedy is the current favorite at $0.55 ask on Kalshi and $0.55 ask on Polymarket — an implied ≈55% chance. Prices as of 14:49 UTC on Jul 13, 2026, delayed about five minutes. Source markets: Kalshi · Polymarket. Resolution follows each venue's own market terms.

Curious how long a gap like this stays open? We measured it.

Anton Shepp

ATPCHALLENGER

Mon 6:30 PM ET

Jack Kennedy
44%48%50%6:53 AM7:07 AM7:25 AM7:42 AM7:58 AM47¢46¢

Moneyline

Anton Shepp1¢ gap
Kalshi47¢Polymarket46¢
Jack Kennedy
Kalshi55¢Polymarket55¢

Prices delayed about five minutes. Each venue's best ask per outcome; Kalshi asks are derived from its NO bids (ask = $1 minus the bid). Kalshi volume counts contracts, Polymarket volume is in dollars. Real-time prices and the full depth ladder are available via the WebSocket stream with an API key. Feed reference DINO-XKQZ7-9182.