Junior middleweight star Tim Tszyu believes that his upcoming opponent, former WBC world champion Tony Harrison, looks fragile.

A few days ago, the two boxers went face to face for the first time in Syndey - during the red carpet premiere for the motion picture Creed III.

The two boxers will collide for the interim-WBO 154-pound title on March 11 at Qudos Bank Arena.

The winner will get a crack at undisputed champion Jermell Charlo in the coming months.

Harrison (29-3-1, 21 KOs) is the only man to defeat Charlo - but Tszyu is not concerned.

He views Harrison as the biggest test of his career, and believes the former champ has better skills than Charlo, but the unbeaten Australian fighter expects to make a big statement when they meet in the ring.

"He looks fragile," Tszyu said to Daily Mail. "I've been sparring big strong, unbreakable blokes and he looks like I could crack him in half.

"If it goes past four (rounds) he'll be in trouble. My aim is to grab him by the neck and pull him down into the ocean and let him sink. That'll start from round one and we'll see when he wants to get air, because he won't get any air.

"He (Harrison) is from the Kronk Gym, he's got a good jab and movement. He's slick and hard to hit, it's a different type of opponent to one I've ever faced. I'm not underestimating him, this is going to be a tough fight.

'He's got better skills than Charlo, he beat Charlo. Styles make fights but just because you've got better skills doesn't mean you're going to win all the time. The bigger the risk, the bigger the reward, aim for the stars."