Massimiliano Allegri is unsure whether Kaka will be fit enough to start in Milan's UEFA Champions League clash with Barcelona on Tuesday.
The Brazilian midfielder played the final 13 minutes of Milan's 1-0 Serie A win over Udinese on Saturday as he continues his recovery from a thigh injury.
Since his return to San Siro from Real Madrid on transfer deadline day, Kaka has only made two appearances for the club, but Allegri is hopeful that he will feature in some capacity against Barca.
"I don't know if Kaka will be able to play from the beginning in the match against Barcelona," he said. "He made a good performance (against Udinese).
"Kaka is an extraordinary player.
"He has to fully recover since he had to stop for 40 days due to a muscle injury. He only played 20 minutes in a midweek match.
"When he entered the pitch (against Udinese) he increased the technical value of the team and represented a great psychological support because he entered when the team could have had more difficulties."
With Lionel Messi, Javier Mascherano and Carles Puyol all returning to full fitness last week, Barcelona will be at full strength for the Milan match. And Allegri knows his side will need to work hard to repeat the 2-0 win over the Spanish champions when the teams met in last season's competition.
"Tuesday's match is worth three points and we should try to gain them because they would almost grant us to qualify," he added. "It surely won't be easy. It will be very difficult.
"They (Barcelona) will be motivated to gain three points. I believe they may have (Lionel) Messi, (Gerard) Pique and (Javier) Mascherano, therefore the whole squad will be available.
"We have to battle and to be very careful and concentrated. It will surely be a beautiful match and we hope we'll be able to achieve a positive result."
|34||N. de Jong|
|Coach: M. Allegri|
|Walker juggles music, football careers in Sweden|
|Song to face ´brother from another mother´ Fabregas|
|Adriano announces Le Havre deal|
|Pardew braced for Old Trafford test|
|Lescott unfazed by City reunion|
|Tskhadadze appointed Georgia coach|
|United to finish top three - Ferdinand|
|Allardyce: Stamford Bridge stalemate saved my job|
|Southampton need three January signings, says Watson|
|Liverpool can make Champions League, says fanzine editor|
|Walsh: Hull clash crucial for Leicester|
|Toure, Aubameyang and Enyeama make shortlist for African gong|
|Docherty backs Chelsea to win two-horse race|
|Liverpool could benefit from Hyypia influence - Scales|
|Saudi Arabia name Asian Cup squad|
|Forty-year-old Cahill no problem for Postecoglou|
|Wenger criticism baffles Redknapp|
|Leicester must strengthen in window - Walsh|
|United not title contenders - Docherty|
|Koeman: Southampton youngsters will get a chance|
|Dyche empathises with Liverpool striker crisis|
|Cagliari turn to Zola|
|Rooney thanks Van Gaal for Christmas break|
|Cruzeiro offer Paulinho Tottenham exit chance|
|Carlisle´s wife grateful to Burnley|
|Katebe called up to Zambia AFCON squad|
|Cape Verde name AFCON squad|
|Finke names much-changed Cameroon squad|
|Grant omits World Cup troublemakers for AFCON|
|Blackpool striker Ranger goes AWOL|
|Allardyce relishing Mourinho meeting|
|Ashley fails to increase Rangers stake|
|Crystal Palace v Southampton: Koeman calls for focus|
|Warnock targeting striker in January|
|Chelsea v West Ham: Adrian vows visitors will attack|
|Heskey signs short-term deal at Bolton|
|Everton v Stoke City: Martinez eyes strong form|
|Juninho defends David Luiz|
|Burnley v Liverpool: Dyche defends Rodgers ahead of Turf Moor test|
|Arsenal v QPR: Wenger eyes festive momentum|
|Liverpool are growing in confidence, says Rodgers|
|Redknapp: Austin future could depend on survival|
|Martinez wants Everton consistency|
|Barca want Neymar until 2020, says agent|
|Jones undeterred by pressure of Liverpool starting role|
|Allardyce ´knows how to beat managers´ - Carroll|
|Jones playing for a new contract|
|China select Evergrande spine for Asian Cup|
|A-League Preview: Koren tips City to build|
|Khedira keen to fight for Real spot|