Arsenal boss Arsene Wenger is angry at Barcelona president Joan Laporta for stating the club "will do all we can to sign Thierry Henry" in the summer.
Wenger has threatened to report Barca over their interest in the 28-year-old.
He told BBC Radio Five Live: "Laporta cannot make a statement like that. It shows a lack of respect. I will try to do something about it.
"If they want to sign Thierry they have to call us because he is under contract for another 18 months."
Striker Henry has so far refused to discuss a new deal at Arsenal.
And that leaves the club in a precarious position - they may have to sell their record goalscorer at the end of the season or allow him to walk out for free the following year.
However, Wenger maintains there is a correct way to make an approach for a player and believes Barcelona's methods are "unfair and unsettling".
He added: "I feel every chairman, be it from Doncaster or Barcelona, should respect the rules in football.
"I'm not worried about Thierry being unsettled. I just think it is negative publicity for Arsenal and we don't need that."