The ATP Montreal Masters lost its top two seeds in the space of a few hours on Wednesday as Germany's Alexander Zverev and Canadian Felix Auger-Aliassime both exited the field.

Felix Auger-Aliassime admitted he was left disappointed after narrowly missing out on his maiden Wimbledon semi-final following a five-set defeat to seven-time champion Novak Djokovic.

Novak Djokovic admitted even he was surprised by his ability to out-last Felix Auger-Aliassime in a five-set epic that ranked as the longest quarter-final in Wimbledon history.

Novak Djokovic battled through Wimbledon's longest ever quarter-final to beat Felix Auger-Aliassime in a five-set epic on Tuesday as the former champion set up a titanic clash with defending champion Jannik Sinner.

Flavio Cobolli came back from a set down to beat Felix Auger-Aliassime 4-6, 6-4, 6-4, 6-4 in the French Open quarter-finals on Wednesday

Top seed Felix Auger-Aliassime needed six match points before despatching Zhang Zhizhen 6-3, 7-6 (7/4) in the first round of the ATP 500 event in Dubai on Monday.

Felix Auger-Aliassime got his ATP Finals bid up and running on Wednesday by beating Ben Shelton 4-6, 7-6 (9/7), 7-5 ahead of Jannik Sinner's clash with Alexander Zverev.

Felix Auger-Aliassime of Canada claimed his first win at this year's ATP Finals by battling back to beat American Ben Shelton 4-6, 7-6 (7), 7-5 on Wednesday.

Italy's Jannik Sinner got his title defence off to a solid start with a dominant straight sets win over ailing Canadian Felix Auger-Aliassime at the ATP Finals on Monday in Turin.

Jannik Sinner will return to the pinnacle of men's tennis when the ATP rankings are updated on Monday.