Will Ferrell hijacked the Australian Open and Roger Federer was his hostage.

In bizarre scenes following the Swiss maestro's 6-3 6-4 6-3 win over Aljaz Bedene on Tuesday night, the Hollywood icon walked onto the court and stole the limelight from the 19-time grand slam champion with an interview as awkward as what you'd expect given the role he's played that will define the actor's legacy.

Famous for β€” among other things β€” playing bumbling newsreader Ron Burgundy in Anchorman and Anchorman 2, Ferrell slipped seamlessly into character as he peppered Federer with a barrage of questions we can safely say the World No. 2 will never have answered before in his life.

Read more: Maria Sharapova back, joins Roger Federer, Novak Djokovic in 2nd round at Australian Open

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At the conclusion of Federer's on-court interview with tennis great John McEnroe, the American asked him to hang around because a "special guest" had a couple of questions for him. The 36-year-old was as surprised as the Rod Laver Arena crowd when Ferrell strode out β€” and his opening line didn't disappoint.

"In the immortal words of Ron Burgundy, it's great to be here with two tennis legends β€” Roger Federer and John McIntosh," Ferrell said, intentionally getting McEnroe's name wrong.

From there the conversation went to wonderful places like eating wombat meat and Federer's resemblance to a "silky gazelle". Here's how it panned out.

Will Ferrell: Roger, tonight you seemed like a gazelle out there on the court. Would you describe your game as a silky gazelle?

Roger Federer: Maybe, maybe not. Don't they get eaten at the end?

WF: Not if they're fast enough. Quick question Roger, you're 36-years-old, you seem ageless, are you a witch or a vampire?

RF: Ahh I don't like those.

WF: There's a rumour in the men's locker room that you love coming to play in Melbourne and your secret to fitness is you only eat wombat meat. Is that true?

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RF: That is untrue. I have not (eaten it). Should I?

WF: It is delicious β€” the national food of Australia. I know how much this crowd means to you, they're an amazing crowd, but does it get annoying when they just scream, "C'mon Roger" over and over again?

RF: "They remind me of my name, it's good. At an older age it's easy to forget sometimes, it's great.

Then, in a line designed to warm the hearts of Anchorman fans everywhere, Ferrell signed off the only way he could after such a sterling performance.

"Stay classy, Melbourne," he said.

Federer reflected on the amusing incident in his post-match press conference.

"I didn't know that was going to happen," Federer said. "That was fun.

"I saw him when I started the match, then I totally forgot he sat there. At the end, I realised he is still actually there. That's when he walked out onto centre court. It was nice to have a Hollywood presence here in Melbourne in combination with the tennis.

"People seemed to enjoy themselves. It was great to see Johnny Mac, too. Love the guy. It was a fun interview, I thought. I don't know about you guys, but I enjoyed it."

When asked who was a better interviewer - McEnroe or Ferrell - Federer admitted the movie star's technique meant it wasn't all fun and games.

"Will Ferrell is a bit more intense, I thought. I was a bit scared," he said. "He stood there, didn't look at me, just was like focusing on the questions. I was a bit worried it was going to come my way. I'm happy I dodged some questions there."