Chelsea has been told it must break the bank if it wants to sign Brazilian international Oscar.
The European champion has approached Internacional over the 20-year-old midfielder and is reportedly preparing a £25million ($A38 million) bid.
"I want the transfer of Oscar to be the biggest transfer deal ever in Brazilian football," Luigi told Radio Gaucha.
"And the Chelsea offer isn't that far from that.
"Last year, however, Tottenham made two offers for
"Oscar's situation is similar. If we get offers for Oscar that match our expectations, we'll negotiate.
"But they have to be of the value that mean significant resources for Internacional.
"But those values would be the biggest negotiation in Internacional's history."
Florent Malouda's potential move in the opposite direction could be scuppered by the French midfielder's wage demands.
Santos head coach Muricy Ramalho is concerned by the financial outlay needed to sign Malouda, who has slipped down the pecking order at Chelsea.
"Malouda was offered to us. He's a very interesting player, but you get scared when they tell you their demands," said Ramalho.
"They say they are in crisis in
"He was offered to us, but when you think about his wages, it gets hard.
"He is a very good player, an old-school midfielder who can hold the ball and set the tone in attack."
An Edin Dzeko double and a late Micah Richards winner helped Manchester City secure an astonishing 4-3 win over Chelsea in St Louis.