Serbia’s Djokovic, competing in his first tournament since he suffered a shock third round defeat at Wimbledon to American Sam Querrey, cruised to a dominant 6-3, 6-2 win over Frenchman Gael Monfils.

Nishikori had earlier sealed his place in the competition’s showpiece encounter by beating Switzerland’s Stanislas Wawrinka 7-6, 6-1.

The women’s final will be between Romania’s Simona Halep, seeded fifth, and Madison Keys of the United States.

Halep overcame Australian Open champion Angelique Kerber of Germany 6-0, 3-6, 6-2 to reach her second consecutive Rogers Cup final after she was forced to retire hurt in 2015.

Keys conquered Kristína Kučová in the other semi-final, progressing thanks to a 6-2, 6-1 win.

Top seed Djokovic was in impressive form in his last four clash with Monfils, the tournament’s 10th seed, as he maintained his perfect record against the Frenchman.

He broke Monfils, who was on a nine-match winning streak, four times on his way to securing a place in the final, where he will have the chance to earn a record 30th Masters title.

“This was my best match of the week and it came at the right time,” Djokovic said.

"You never know what is going to come the other way from a guy who has been in top form the last couple of weeks.

"He won in Washington last week and came in here and won comfortably in most of his matches. 

"I had to stay committed from the beginning and I'm very, very pleased with the way I played."

Japan’s Nishikori, forced to pull out of Wimbledon earlier this month due to an ongoing rib injury, also impressed as he battled through the opening set before taking the second in style against Wawrinka, winner of the 2015 French Open.

“It's just great to be into another Masters final - I'm looking forward to my opportunity,” Nishikori said.