Corinthians president Andres Sanchez claims Juventus have entered the race to sign Carlos Tevez but insists his own club will not increase their offer for the want-away Argentinian.
City turned down a £40million bid from Corinthians for Tevez earlier this week, with the club believed to be holding out for £50m for a player who finished as joint top scorer in the Barclays Premier League last season with 20 goals.
Tevez's advisor, Kia Joorabchian, insisted this week that a deal with Corinthians remains "close", however, with the player himself keen on a return to the club he previously represented between January 2005 and August 2006.
Juventus' reported interest might be viewed as the trigger for a bidding war, but Sanchez is unwilling to engage the Italian club and is adamant the offer on the table will remain unchanged.
"I will do everything possible so that he can join us but I will not increase the offer by a cent," Sanchez told Brazilian sports newspaper Lance.
"Our offer stands until next year.
"City have an offer of 52million euros (£45.6m) from Juventus, but Tevez does not want to remain in Europe.
"I still dream of the possibility [of signing him] but it depends on Manchester City, and the player's decision means a lot."
Sanchez moved for the Argentina international after being alerted by Tevez's admission earlier this month that he wished to leave City for the sake of his family, with his two children based in Argentina.
The 27-year-old, who has previously played for West Ham and Manchester United, is under contract at City until June 2014.