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Alvarez has been the subject of transfer speculation throughout the summer, and is also reportedly of interest to Premier League champion Arsenal. 

The 26 year-old was jeered by Atletico supporters on Monday during their 2-2 draw with Villarreal in LaLiga, and Alvarez reportedly missed training on Thursday. 

Reports say Alvarez was unwell, and Atleti has condemned Laporta's latest video, which said Barcelona's €100m (£85.7m) offer remained on the table.

The Blaugrana have already had an offer worth over €100m knocked back by Atleti earlier in the summer after making Alvarez its top target to replace Robert Lewandowski.

"This is not about money, it's about dignity. The player is being victimised, but the only victim in the Julian case is us," Atleti said.

"They have harmed us economically and socially. There is 0% chance of selling him to Barca.

"There is a campaign of many lies and half-truths. The only one paying for this is Atletico."

Last season Alvarez contributed to 29 goals in 49 games for Atleti, the fifth-most in LaLiga.

Barcelona's interest has particularly angered Atleti, which reported the LaLiga champion to FIFA and the Royal Spanish Football Federation for trying to sign Alvarez.

Despite that, Laporta insists Barcelona has behaved well throughout the whole affair.

"It goes without saying that Barcelona absolutely respect Atletico and the club's directorate, who we have known for many years and have a lot of appreciation for," Laporta said.

"We made a significant offer to Atletico for Julían, a player our coach has a real interest in signing, which was ratified during a telephone call to Miguel Angel Gil Marin.

"He told me they would not transfer him as they didn't have a replacement. I said when they have one, if the summer window was still open, we would be there to do a deal."