This market refers to the tennis match between Marta Kostyuk and Katherine Sebov in the National Bank Open, originally scheduled for August 4, 2026 at 2:00PM ET.
This market will resolve to 'Marta Kostyuk' if Marta Kostyuk advances against Katherine Sebov.
This market will resolve to 'Katherine Sebov' if Katherine Sebov advances against Marta Kostyuk.
If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50.
If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances.
If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.
The primary resolution source will be official information from the WTA Tour. A consensus of credible reporting may also be used.
National Bank Open: Marta Kostyuk vs Katherine Sebov
WTA
Katherine Sebov6⁴0
Marta Kostyuk76Final
Game context
Marta Kostyuk enters this National Bank Open first-round matchup in Toronto as the clear favorite, seeded around No. 10 with a WTA ranking near No. 11, facing Canadian wild card Katherine Sebov, ranked approximately No. 231. The significant gap in experience, recent form, and overall level gives Kostyuk a substantial edge on the hard courts, consistent with typical outcomes in such lopsided draws. Sebov gains a modest home-crowd boost and familiarity with the venue but lacks the results or ranking points to challenge a player of Kostyuk’s caliber in most scenarios. No notable injuries or late withdrawals have altered the field, and the match is scheduled for later on August 4, making confirmed pre-match factors like seeding and ranking the dominant drivers of current trader consensus.
Moneyline
$147.2K Vol.Match Completed
Set Winner
1st Set Winner
$4K Vol.1st Set Total
$27 Vol.National Bank Open: Marta Kostyuk vs Katherine Sebov Set 1 O/U 8.5
National Bank Open: Marta Kostyuk vs Katherine Sebov Set 1 O/U 9.5
National Bank Open: Marta Kostyuk vs Katherine Sebov Set 1 O/U 10.5
Set Total
$71 Vol.National Bank Open: Marta Kostyuk vs Katherine Sebov Total Sets: O/U 2.5
National Bank Open: Marta Kostyuk vs Katherine Sebov Set 2 O/U 8.5
National Bank Open: Marta Kostyuk vs Katherine Sebov Set 2 O/U 9.5
National Bank Open: Marta Kostyuk vs Katherine Sebov Set 2 O/U 10.5
Set Handicap
$716 Vol.National Bank Open: Marta Kostyuk vs Katherine Sebov Set Handicap +/-1.5
National Bank Open: Marta Kostyuk vs Katherine Sebov Set Handicap +/-1.5
Total Games
$1.4K Vol.National Bank Open: Marta Kostyuk vs Katherine Sebov Match O/U 21.5
National Bank Open: Marta Kostyuk vs Katherine Sebov Match O/U 22.5
National Bank Open: Marta Kostyuk vs Katherine Sebov Match O/U 23.5
Resolution Source: www.wtatennis.com
Odds & FAQ
What are the current odds for National Bank Open: Marta Kostyuk vs Katherine Sebov?
At 99%, Completed Match has pulled far clear of National Bank Open: Marta Kostyuk vs Katherine Sebov Set 2 Winner (99%). Prices stay live until resolution, but the market sees one clear outcome.
What do traders predict for National Bank Open: Marta Kostyuk vs Katherine Sebov?
Traders price Completed Match at a 99% implied probability - about as confident as prediction markets get. Real money stands behind that number, updated live.
When does the National Bank Open: Marta Kostyuk vs Katherine Sebov market resolve?
The market runs until 11 Aug 2026 (7 days left), then settles according to Polymarket's published resolution rules for this event.
How much money is trading on National Bank Open: Marta Kostyuk vs Katherine Sebov?
Traders have put $9.7M through this market so far - a solid gauge of how much real money backs these odds.
How can I trade National Bank Open: Marta Kostyuk vs Katherine Sebov on Polymarket?
Follow this page for live prices; trading happens on Polymarket itself. Start small - implied odds move, and so can your position's value.
