Canada upset hosts Australia at the Hopman Cup with Eugenie Bouchard confirming her status as one of the potential stars of 2014.
The teenager beat world number 18 Sam Stosur 4-6 6-2 6-3, whilst Milos Raonic beat Bernard Tomic 7-6 (8-6) 6-1 to wrap up victory.
The Australians gave the home crowd in Perth something to cheer with a consolation victory in the mixed doubles.
Bouchard, 19, was named the WTA's Newcomer of the Year in November and is currently 32 in the world.
She is expected to climb much further in 2014 was pleased to have reversed her defeat to Stosur in the final in Osaka in October.
"It was a good first match for me," she said. "We had a good battle in Osaka and I got my revenge tonight."
Raonic slammed down 19 aces against Tomic, who once again showed little fight in the second set, after a tight opening set.
"He has the best serve in the world right now," Tomic said. "There wasn't much I could do."
Agnieszka Radwanska opened her season in style by beating Flavia Pennetta in straight sets as Poland whitewashed Italy 3-0.
The world No 5 won 6-2 6-2 against a player ranked 26 spots further down the ranking, before Grzegorz Panfil made it 2-0 for the Poles by winning the men's singles.
World No 288 Panfil, who was a late call-up for the mixed team event following the withdrawal of Wimbledon semi-finalist Jerzy Janowicz due to injury, beat Andreas Seppi.
The Italian retired because of illness after four games of the second set, having earlier lost the opener 6-4.
Radwanska and Panfil were then awarded a walkover in the final mixed doubles match as Seppi was unfit to play.
Radwanska said: "I didn't have much time to adjust and I only slept for like three hours.
"In Poland it was about five degrees so I was very happy I could play my best tennis, playing alright for the first day here."
Seppi is hopeful of being fit to play in Italy's next tie against Australia on Tuesday.