This market refers to the tennis match between Elise Mertens and Naomi Osaka in the National Bank Open, originally scheduled for August 8, 2026 at 10:00AM ET.
This market will resolve to 'Elise Mertens' if Elise Mertens advances against Naomi Osaka.
This market will resolve to 'Naomi Osaka' if Naomi Osaka advances against Elise Mertens.
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: Elise Mertens vs Naomi Osaka
WTA
Naomi Osaka
0-0
–
vs
07/08 22:10
–
Elise Mertens
0-0
Game context
Naomi Osaka enters the National Bank Open third-round matchup in Toronto with strong momentum after defeating Elise Mertens in straight sets on grass at the Bad Homburg Open earlier this season, her first quarterfinal appearance of 2026. Both players arrive with solid recent form, each posting seven wins in their last ten matches, though Osaka holds the edge in head-to-head results and Grand Slam pedigree as a four-time major champion. Mertens advanced past Anna Bondar in the prior round on the outdoor hard courts and maintains a consistent doubles ranking near the top ten. The hard-surface shift from grass could favor Osaka's power game, while Mertens looks to leverage her experience in high-level WTA 1000 events. No major injury concerns have been reported for either player ahead of the evening session.
Moneyline
$98.6K Vol.Match Completed
1st Set Total
$4 Vol.National Bank Open: Elise Mertens vs Naomi Osaka Set 1 O/U 8.5
National Bank Open: Elise Mertens vs Naomi Osaka Set 1 O/U 9.5
National Bank Open: Elise Mertens vs Naomi Osaka Set 1 O/U 10.5
1st Set Winner
Set Total
$910 Vol.National Bank Open: Elise Mertens vs Naomi Osaka Set 2 O/U 8.5
National Bank Open: Elise Mertens vs Naomi Osaka Total Sets: O/U 2.5
National Bank Open: Elise Mertens vs Naomi Osaka Set 2 O/U 9.5
National Bank Open: Elise Mertens vs Naomi Osaka Set 2 O/U 10.5
Set Winner
Total Games
$410 Vol.National Bank Open: Elise Mertens vs Naomi Osaka Match O/U 21.5
National Bank Open: Elise Mertens vs Naomi Osaka Match O/U 22.5
National Bank Open: Elise Mertens vs Naomi Osaka Match O/U 23.5
Set Handicap
$20.7K Vol.National Bank Open: Elise Mertens vs Naomi Osaka Set Handicap +/-1.5
National Bank Open: Elise Mertens vs Naomi Osaka Set Handicap +/-1.5
Resolution Source: www.wtatennis.com
Odds & FAQ
What are the current odds for National Bank Open: Elise Mertens vs Naomi Osaka?
The money is on National Bank Open: Elise Mertens vs Naomi Osaka Set 1 O/U 8.5 at 70%; National Bank Open: Elise Mertens vs Naomi Osaka Set 2 O/U 8.5 follows at 51%. Live order-book odds, refreshed with every fill.
What do traders predict for National Bank Open: Elise Mertens vs Naomi Osaka?
The market makes National Bank Open: Elise Mertens vs Naomi Osaka Set 1 O/U 8.5 the favorite at 70%. Implied probabilities come from real positions, and they move as traders digest new information.
When does the National Bank Open: Elise Mertens vs Naomi Osaka market resolve?
Mark 15 Aug 2026 (8 days left): that's when this market is due to resolve, following Polymarket's published criteria once the result is verified.
How much money is trading on National Bank Open: Elise Mertens vs Naomi Osaka?
Traders have put $5.1M through this market so far - a solid gauge of how much real money backs these odds.
How can I trade National Bank Open: Elise Mertens vs Naomi Osaka on Polymarket?
You can watch the odds move here in real time and trade the market directly on Polymarket. As always, prediction trading carries real risk.
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