The Canadian Masters will have the entire Quarter Final lineup settled by the end of play on Sunday as the Fourth Round comes to a conclusion.
Weather conditions have been pretty difficult for the players and that has led to a number of surprise results.
The ATP tournament always felt wide open after the withdrawals before the event even began, but the early defeat suffered by Alexander Zverev means this is a Masters tournament that is filled with opportunity for those remaining.
It has been a different story in Toronto where the WTA tournament is being played and where the big stars have come through a couple of Rounds.
This means the tournament is set up to give us an early look at some of the potential US Open Champions, although the focus right now has to be on winning one of the big tournaments outside of the Grand Slams.
Tallon Griekspoor v Daniel Merida Aguilar: Jannik Sinner, Novak Djokovic and Carlos Alcaraz all announced they would be missing the Canadian Masters for various reasons and Alexander Zverev has been beaten before the tournament has really gotten going.
All of this means a big opportunity has opened up for someone to pick up a big title and it really does feel like the ATP event in Montreal is wide open.
Tallon Griekspoor is the reason that the draw has opened up thanks to his upset win over Zverev and he has been able to back that up by moving through to the Fourth Round. He fought through some difficult moments to win in the Third Round and Griekspoor will have taken plenty of confidence out of that performance to follow up the win over Alexander Zverev.
Next up is a young Spaniard who has put together a very good tournament.
Daniel Merida Aguilar has had a decent year on the hard courts, but has really impressed over the last week and the World Number 63 is set for another jump in the World Ranking. A new career high mark is going to be set, regardless of when this tournament run comes to a conclusion, and Merida Aguilar can play with some freedom.
The serve still needs some developing on the hard courts, but Daniel Merida Aguilar has been very effective on the return and that could make him dangerous.
However, Tallon Griekspoor has found his rhythm on the return at this tournament and he should be able to put some pressure on the younger player in what is likely another competitive match.
Overall, it is the lower Ranked player who has impressed the most here in Montreal and Tallon Griekspoor also has the best win on the record- he may just be able to find his best tennis when he needs it the most and that can see him come through a Fourth Round match that is likely going to be decided by the fine margins.
Jakub Mensik - 3.5 games v Botic van de Zandschulp: The run to the French Open Semi Final was the full breakthrough on the Tour for Jakub Mensik, but it should be remembered that he as won a Masters tournament on the hard courts of Miami last year.
There is a lot of encouraging signs around the development of Jakub Mensik and he will certainly feel he has every chance of winning a second Masters considering the absence of so many big names.
The serve has been a big weapon this week, as it usually is for Jakub Mensik, but the really eye-catching part of his performances has been the quality of return produced.
It should be good enough to put Botic van de Zandschulp under pressure, although the World Number 70 will have taken a huge amount of heart from beating Daniil Medvedev and Hubert Hurkacz. Both of those opponents had gotten the better of van de Zandschulp in previous matches on the Tour and so those wins here in Montreal should have given the veteran a boost in confidence, as well as pushing him back up the World Rankings.
Botic van de Zandschulp has played well this week, but the returning numbers will be hard to maintain against a server like this one.
The Dutchman is winning 60% of his service points, which will give him a chance to stay in the match, although Jakub Mensik is expected to have enough success on the return to cover the handicap mark here.
Ben Shelton v Joao Fonseca: The early defeats at both Masters events in Indian Wells and Miami and the Quarter Final loss in Washington last week will have been a disappointment for Ben Shelton, but he is the defending Champion of the Canadian Masters. He has shown that he is not going to give up this trophy easily after two very strong wins, while Ben Shelton may feel like the favourite considering the top Ranked players that will not be competing in the coming days.
This may be one of the tougher challenges against Joao Fonseca.
The talented youngster will be aiming to finish within the top 20 of the World Rankings at the end of the season and Joao Fonseca is expected to be Seeded at the US Open, which will give him a chance to push towards those positions.
However, Joao Fonseca has yet to find the consistency on the hard courts that some may have expected- at his best, he can be very tough to deal with, but Fonseca has not played as much tennis on this surface in 2026 as he may have expected.
Wins over Stefanos Tsitsipas and Casper Ruud show the kind of level that Joao Fonseca can produce, but Ben Shelton has already gotten the better of this opponent on the European clay courts.
That should be a surface that favours Fonseca more than Shelton, but the latter had the superior serve and that is expected to be the case on a hard court in North America.
A deciding third set may be needed, but Ben Shelton looks like he deserves a stronger edge in the outright market to move through to another Quarter Final at the Canadian Masters.
MY PICKS: Tallon Griekspoor @ 1.80 Bet365 (1 Unit)
Jakub Mensik - 3.5 Games @ 1.83 Bet365 (1 Unit)
Ben Shelton @ 1.80 Bet365 (1 Unit)
Canadian Masters: 13-14, - 3.46 Units (27 Units Staked, - 12.81% Yield)