Raonic, from Thornhill, Ont., was coming off a third-round loss to Stanislas Wawrinka of Switzerland at the Shanghai Masters. Prior to that, he was victorious in Thailand and reached the final in Tokyo.
Paire will face seventh-seeded Grigor Dimitrov on Saturday after the Bulgarian beat left-handed Kenny De Schepper of France 6-4, 6-2.
Top-seeded David Ferrer of Spain also advanced when his quarter-final opponent, countryman Fernando Verdasco, pulled out because of an abdominal injury.
Ferrer will face fifth-seeded Ernests Gulbis of Latvia, who had more of a struggle as he advanced with a 7-5, 4-6, 6-3 win over Jerzy Janowicz of Poland in little over 2 hours.