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ATPCHALLENGER·Mon 1:00 PM ET

Justin Boulais vs Zhizhen Zhang

Zhizhen Zhang is the current favorite at $0.79 ask on Kalshi and $0.80 ask on Polymarket — an implied ≈79% chance. Prices as of 06:55 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.

Justin Boulais

ATPCHALLENGER

Mon 1:00 PM ET

Zhizhen Zhang
24%26%28%30%32%12:37 AM12:46 AM12:54 AM1:03 AM1:10 AM25¢27¢

Moneyline

Justin Boulais2¢ gap
Kalshi25¢Polymarket27¢
Zhizhen Zhang1¢ gap
Kalshi79¢Polymarket80¢

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.