England fast bowler Jofra Archer has warned his Indian Premier League teammate Steve Smith there will be "nothing friendly" when the teams go head-to-head in World Cup clash on Tuesday.
Tuesday's game has added more significance for England after their surprise loss to Sri Lanka as the tournament hosts aim to finish in the top four.
Asked if he thought of Smith as a friend, Archer said Sunday: "Yes, and I'd like to think he considers me the same way as well.
"He's a really good guy. But cricket is cricket and I guess it's time to be friends after. Until the game is over, there will be nothing friendly about it."
Smith and Warner have already received plenty of taunts from the crowds following their return from ball-tampering bans.
But they have shrugged off the jeers, with Warner in particular being in superb form with two centuries already.
Archer hopes his rapid pace and some inside knowledge of Smith could prove useful at Lord's, even though he suggested Smith had not been keen to face him in the nets during their stint for Rajasthan Royals at the IPL.
"To be honest, I didn't bowl at him much," said Archer.
"A lot of the guys probably don't want to face me or (West Indies quick) Oshane Thomas in the nets. They like the side-arm and the throw downs.
"But when you play with them you pick up on things you won't normally notice when you're just playing against them."
"So hopefully me and Ben can get together, I think we might bowl together at some point as well. We probably know what to do when he's in."
Barbados-born Archer qualified to play for England in March, meaning the clash at Lord’s will be the first time he has played against Australia in a competitive international.
"Just from watching the Ashes and stuff I know it is a pretty intense game between them," he said.
"I'm not too sure if it will affect me coming in without having experienced it before. It could be an advantage, me not being part of what happened before."