Melbourne VIC, Australia, 13 January 2014 | AAP

Bernard Tomic is clinging to his recent domination of left-handers as a source of hope that he can conjure one of the great Australian Open upsets against Rafael Nadal.

Tomic enters the daunting first-round showdown having won seven of his eight clashes with southpaws over the past 18 months.

“I don’t mind playing left handers,” the 21-year-old said ahead of their prime-time clash at Rod Laver Arena on Tuesday night.

But there are left-handers and there is Rafael Nadal and Tomic knows upstaging the world No.1 and 13-times grand slam champion is an altogether different proposition than beating the likes of Albert Ramos, Kenny de Schepper, Michael Berrer and Cedric-Marcel Stebe.

Nadal is coming off a 10-title season in 2013 and is desperate to add the Norman Brookes trophy to the French Open and US Open trophies he’s minding at home in Mallorca.

“I’ve got a breakdown of what I need to do,” Tomic said.

“His game is very unique and he’s the best at what he does.

“This is why he’s No. 1 in the world and a great champion.

“So I need to play my game and just relax.”

But after watching Juan Martin del Potro blow Tomic away in the Sydney International final on Saturday, Australian Davis Cup captain Pat Rafter cautioned the world No.57 against relaxing too much.

Rafter said even the slightest lapse in concentration could spell doom for Tomic.

“I expect it will be a great match,” Rafter said.

“I was really excited the way Bernie played in Sydney, how he backed that up and defended as well as he did.

“Obviously the finals didn’t go to script for him. He played one loose game, del Potro played great from then on and gave him no chance.

“I hope that’s a warning for him. You can’t play one good game against these guys.

“If you give these guys a sniff, they’ll jump all over you. Rafa is the best at that in the world, of not letting anybody back in the match.

“If you give him an opportunity, he’ll take it.

“Bernie in the past has been a little bit up and down in these matches, has these lulls. He can’t afford to have them.”

Rafter, though, suspects Nadal will be dreading his first-round draw as well and gives Tomic a fighting chance of producing a boilover.

“If Bernie plays and keeps that intensity, he’s going be to be very difficult to beat. Rafa knows that,” he said.

“Rafa is not happy with his draw. Bernard is not seeded, but he’s a potential seed, for sure. He’s one of those guys you don’t want in the draw.”

James Duckworth also has an unenviable task against four-time champion Roger Federer, the sixth seed this year.

Marinko Matosevic plays Japan’s 16th seed Kei Nishikori, Lleyton Hewitt faces Italian 24th seed Andreas Seppi, reigning Australian Open junior champion Nick Kyrgios meets German Benjamin Becker and fellow young gun Thanasi Kokkinakis goes up against Dutchman Igor Sijsling.