Melbourne - Liverpool owner John W. Henry questioned whether Arsenal were on drugs on Wednesday after they made a renewed bid to sign top striker Luis Suarez.
"What do you think they're smoking over there at Emirates?" tweeted the American businessman, after Arsenal reportedly offered 40 000 001 pounds ($61 million) for the Uruguayan star.
Liverpool rank Suarez, the Premier League's second top-scorer last season with 23 goals, in the same category as Edinson Cavani, who joined France's Paris Saint Germain for 55 million pounds.
According to British reports, Arsenal's offer of over 40 million pounds triggers a clause in Suarez's contract which says Liverpool must consider the bid and inform the player.
It was not clear whether Henry was scoffing at Arsenal's attempt to sign Suarez from a rival club, or at the amount they are offering.
Suarez joined Liverpool in Melbourne during their pre-season tour on Sunday and may appear during Wednesday's sell-out friendly at the 95 000-seat Melbourne Cricket Ground.
If he takes the field it will be his first game since being handed a 10-match ban for biting Chelsea's Branislav Ivanovic in April. Suarez will miss the start of the Premier League season because of the ban.
Liverpool captain Steven Gerrard said he had been working to convince Suarez to stay at the club since he flew in from Montevideo, telling him there's "a lot of love" for him at Liverpool.
"He is still a Liverpool player," the club captain told The Australian newspaper.
Suarez, 26, has made clear he is keen to play Champions League football. But manager Brendan Rodgers said he was in "great spirits" as he joined his team-mates.
Asked this week whether he expected Suarez to remain at Liverpool, Rodgers said: "Yes, very much so."
He added that he was relaxed about the Suarez speculation, saying "the bottom line is he is employed by the club".
"He's an integral part of the squad. He's arrived in great spirits," Rodgers said.
Pressed on what would be the price-tag for Suarez, Rodgers replied: "I didn't say we would sell him. I said that every player has a value and a worth. Doesn't mean you've got to sell them."