Unfortunately, Rafael Nadal and Juan Martin Del Potro have withdrawn from the tournament due to their various injuries, giving Japan's Kei Nishikori and the big-serving American John Isner the two remaining spots in the glittering field.
The world No. 2, who has been sidelined with a right knee injury he sustained in the US Open semifinals, was scheduled to play in the ATP World Tour Finals, which begin Sunday in London.
Nadal has retired from two of the three hard-court events he has competed at this season - the Australian Open and the US Open - but won the other, the Rogers Cup.
Nadal withdrew from next week's ATP Finals citing an abdominal injury and announced he was having arthroscopic surgery on his right ankle.
"It is true that we had detected it for a long time and from time to time it bothered me".
"This way I hope to be in full condition for the next season", he said, and thanked his supporters.
So not much has changed, except for the fact it is a different injury causing him to end his season prematurely.
12 years later, Jo-Wilfried Tsonga repeated that feat in Canada as well, entering the tournament ranked 15th and playing some rock solid tennis in order to beat world number 1 Novak Djokovic, Andy Murray, Grigor Dimitrov and Roger Federer to secure the title after four straight Top 10 triumph.
By virtue of Nadal's withdrawal, Novak Djokovic has mathematically clinched the year-end No. 1 ranking. He had his best run at Wimbledon in seven years as he reached the semi-finals before losing a thrilling match to Djokovic.
Any year in which you win an 11th title at Roland Garros, Barcelona and Monte Carlo is hardly a wasted one, and yet this has been a deeply frustrating year for Nadal.
Djokovic has also not been afraid to take chances and innovate his game, bringing in Boris Becker as part of his coaching team for the start of the 2014 season, although he has since reunited with long-time mentor Marian Vajda.