Alexander Zverev Stunned in Montreal Open Opener as Tallon Griekspoor Pulls Off Huge Upset

Alexander Zverev's Canadian Open campaign came to a shocking end as the top seed was knocked out in his opening match at the Montreal Open 2026. Dutch star Tallon Griekspoor produced a superb comeback to defeat the German 7-6(3), 2-6, 6-4, handing one of the tournament favorites an unexpected early exit.

The defeat is a major setback for Zverev, who entered the ATP Masters 1000 event hoping to build momentum ahead of the US Open after an outstanding season that included his maiden Grand Slam title at Roland Garros.

Griekspoor Delivers a Stunning Comeback

Zverev looked in control after edging a tight first-set tie-break, but Griekspoor refused to back down.

The Dutchman raised his level in the second set with aggressive baseline play and consistent serving before carrying that confidence into the decider. He broke Zverev at a crucial stage and held his nerve to complete one of the biggest upsets of the tournament.

For Griekspoor, the victory ranks among the biggest wins of his career and sends him into the next round full of confidence.

A Blow to Zverev's US Open Preparations

The Montreal Open was expected to be a key part of Zverev's preparations for the North American hard-court swing.

Instead, the early defeat raises fresh questions about his form heading into the Cincinnati Open and the US Open 2026. With valuable ATP ranking points also at stake, the German leaves Canada earlier than expected.

Opportunity for Other Title Contenders

Zverev's exit opens up the draw for several other contenders chasing the prestigious ATP Masters 1000 title.

With a number of top players already absent from the tournament, the competition has become even more unpredictable, giving rising stars and experienced campaigners alike a stronger chance of making a deep run.

Can Zverev Bounce Back?

Despite the disappointment, Zverev still has time to regroup before the US Open.

The German has consistently shown resilience throughout his career and will now shift his focus to Cincinnati, where he hopes to rediscover his best tennis before the final Grand Slam of the season.

Final Thoughts

Alexander Zverev's early exit is one of the biggest surprises of the Montreal Open 2026. While Tallon Griekspoor celebrates a memorable victory, Zverev will be looking to put this setback behind him quickly as the countdown to the US Open continues.