Temperature at Melbourne Park is forecast to hit 39 degrees Celsius this week and American actor and comedian Will Ferrell discussed how he plans to beat the heat.

"You know, everyone says hydrate. I don't," he told a news conference.

"I don't drink any fluids except for I drink a lot of clam chowder. I don't know if you guys call it down here clam chowder. Hot, thick soups. That's the way to go. And hot milk. Yes."