Perth WA, Australia, 29 December 2013 | AAP

Australian pair Bernard Tomic and Sam Stosur say there’s no reason to panic despite suffering opening-night losses at Perth’s Hopman Cup.

Tomic imploded in the second set on the way to a 7-6(6) 6-1 defeat to big-serving Canadian Milos Raonic before Stosur fell 4-6 6-2 6-3 loss to rising Canadian star Eugenie Bouchard.

Stosur is notorious for her slow starts to the Australian summer and chose to appear at the Hopman Cup for the guarantee of three singles matches.

The world No.18 was rusty at times against Bouchard but is confident her form will improve as the tournament wears on, starting with Tuesday’s clash with Italian Flavia Pennetta.

“I guess you kind of feel a little bit rusty in some areas. But some areas felt good,” Stosur said.

“It was a decent match. She played well. She was very aggressive. I probably didn’t quite counteract that enough. It wasn’t the way I wanted to start the season, but it was OK.”

Tomic said he simply had no answers to Raonic’s powerful serve, which hit speeds in excess of 220km/h.

“He has the best serve in the world right now. There wasn’t much I could do,” Tomic said.

“His serve was that good. I was struggling to get a racquet on it.

“That first match was good to play for me, hopefully I start to free up in the next few matches here.”

Tomic will be aiming to turn his fortunes around when he meets Andreas Seppi on Tuesday.

Seppi retired from his opening Hopman Cup match due to illness but is expected to recover in time to take on Tomic.

Australia, who lost 2-1 to Canada after winning the mixed doubles rubber 6-2 6-4, must beat Italy and Poland to have any chance of reaching the final.

World No.32 Bouchard said Stosur’s serve wasn’t the only weapon she was trying to contain.

“She has a really good forehand, and she likes to run around a lot and control the point,” Bouchard said.

“So I was trying to not let her do that. I was trying to be the aggressive one and step in and control the point, and I think overall I did that well.”