Novak Djokovic called for the doctor during the second set against Adrian Mannarino but put aside his discomfort to progress 4-6, 6-2, 6-1.
The world number one Spaniard was untouchable as he schooled Paire for the fourth time without a loss, taking 74 minutes as he broke six times.
Novak Djokovic beat Bosnia and Herzegovina's Mirza Basic 6-3, 7-6 (7-3) in the first round of the Rogers Cup.
Novak Djokovic appointed the pair of Marian Vajda and fitness coach Gebhard Gritsch after axing Andre Agassi and Radek Stepanek.
Rafael Nadal recently lost to Novak Djokovic in the second longest Wimbledon semi-final ever played.
Djokovic beat Kevin Anderson 6-2, 6-2, 7-6 (7-3) to claim his fourth Wimbledon men's singles crown.
Novak Djokovic won his fourth men's singles title while Angelique Kerber became the first German in 22 years to win the women's crown.
Novak Djokovic added the 2018 title to his wins in 2011, 2014 and 2015.
Wimbledon Men's Final highlights, Novak Djokovic vs Kevin Anderson Tennis Match: Novak Djokovic became the lowest-ranked champion since Goran Ivanisevic in 2001 to lift the title for the fourth time.
And after a shattering quarter-final exit at this year's Roland Garros, which saw his world ranking slump to its lowest in 12 years, the Serb considered sitting out Wimbledon where he has been champion in 2011, 2014 and 2015.
The 31-year-old former world number one won the last of his 12 majors at the 2016 French Open when he completed the career Grand Slam.
Novak Djokovic reached his fifth Wimbledon final with a 6-4, 3-6, 7-6 (11/9), 3-6, 10-8 victory over Rafael Nadal in the second longest semi-final ever played at the tournament.
Wimbledon Women's Final highlights, Serena Williams vs Angelique Kerber Tennis Match: Angelique Kerber became the first German to win a Wimbledon singles title since Steffi Graf in 1996.
The eagerly-awaited semi-final was halted just after 11pm (2200GMT) under a curfew agreement with Djokovic leading Nadal 6-4, 3-6, 7-6 (11/9).
The epic battle between Kevin Anderson John Isner lasted for 6 hours and 35 minutes with final score reading 7-6, 6-7, 6-7, 6-4, 26-24 in Anderson's favor.
Rafael Nadal will clash against long-time rival Novak Djokovic for the 52nd time on Friday with a Wimbledon 2018 final spot at stake.
Nadal is chasing an 18th Grand Slam title which would put him just two behind Roger Federer who was sensationally knocked out in the quarter-finals by Kevin Anderson.
The two-time Wimbledon champion will face Djokovic, a three-time winner at the All England Club, for a place in Sunday's final. Djokovic leads their epic head-to-head rivalry 26-25.