AC Milan coach Massimiliano Allegri has warned his players to be extra cautious of Fiorentina after their recent coaching change.
The Rossoneri travel to Florence for Saturday's game at the Artemio Franchi stadium riding a five-match winning streak.
They are third in Serie A, one point behind league leaders Udinese but the Rossoneri do have a game in hand.
However, Allegri believes the arrival of coach Delio Rossi to the Fiorentina hotseat before the international break will have a positive impact on the Viola.
The experienced Rossi replaced sacked Sinisa Mihajlovic earlier this month.
Allegri, whose side host Barcelona on Wednesday with both teams through to the knock-out stages of the Champions League, said: "We want to remain in the high positions of the standings.
"But tomorrow we face a Fiorentina side that has found new enthusiasm after a coaching change.
"We will have to play a great game to bring home a positive result.
"To face teams coached by Rossi is always difficult and we must be aware that we will take on a team that will have found new motivations, as well as new work methods and we must be ready."
Rivals Fiorentina will have to keep a close eye on Zlatan Ibrahimovic.
The AC Milan forward will be eager to notch his 100th goal in Italy's top flight this weekend.
Milan also have striker Alexandre Pato back after almost two months on the sidelines through injury.
The Brazil international will start from the bench with Robinho set to partner Ibrahimovic up front.
Rossi, meanwhile, is aware of the challenge that awaits his men on Saturday.
The former Palermo tactician has inherited a side that sits 13th with just three wins from 10 games.
Fiorentina have mustered just one win from their last seven games.
"AC Milan are in great form and it will be very difficult to stop them," Rossi said.
"But we will try to do our best and get a result at home."
Fiorentina expect striker Stevan Jovetic to play despite him suffering a muscle injury.
The hosts will be without suspended defender Cesare Natali.