Inter and Milan are engaging in a €15m derby for Atletico Madrid midfielder Mario Suarez.
The Rossoneri had shown interest in Mario Suarez earlier this week, but now Sky Sport Italia claim that their city rivals have also dived in with a proposal.
Milan want to sign the 27-year-old on loan with an option to buy at the end of the season.
However, Inter are proposing a mandatory buy-out clause for €15m in July.
It is the same approach that allowed the Nerazzurri to beat Liverpool to Xherdan Shaqiri from Bayern Munich.