Celtic will play Artur Boruc against AC Milan despite fears he needs a knee operation.

The Poland goalkeeper will be examined after tomorrow's Champions League encounter at the San Siro to determine whether he goes under the knife this week.

Celtic will still be without injured defenders Lee Naylor (calf), John Kennedy (knee), Mark Wilson (knee) and Jean-Joel Perrier-Doumbe (Achilles), while midfielder Shunsuke Nakamura (knee) is also missing.

AC Milan coach Carlo Ancelotti has warned Celtic they will have their work cut out to earn the point they need to progress to the next phase.

The Rossoneri, winners of last season's competition, have already clinched their place in the next round but group supremacy is still up for grabs.

"I will not make any changes," Ancelotti said.  "We are giving a lot of importance to this game.  We will play with our best line-up tomorrow. Even if we have already qualified, we want to finish top of our group."

A draw in Milan would satisfy both sides as the hosts lead Group D, one point clear of Celtic.

Shakhtar Donetsk are three points behind the Scottish giants.

"In the case this game would finish in a draw, I don't fear criticism," said Ancelotti.  "We will go out to do our duty. Tomorrow we will play showing loyalty and respect for everyone."

Ancelotti is well aware of the challenge his team face against Gordon Strachan's side.

Milan have only suffered one defeat in Europe's elite club competition this season - 2-1 at Celtic Park in October when Scott McDonald's 89th-minute winner handed the Scots victory.

"Celtic has a team with great strength, speed and technical quality," said Ancelotti. "But the Scottish team hands out great performances at home but they do less well on their travels."

Celtic will have an added motivation to emerge triumphant as they have never won on Italian soil in seven visits.

But Ancelotti believes his team have the edge.

"In the Champions League we have always done well and I'm sure we will show our quality tomorrow," he said.

Ancelotti will have to do without Brazilian striker Ronaldo, who sustained a calf injury last week and will be unavailable for selection.

But the manager will have Kaka, who was named European Footballer of the Year and collected the Ballon D'Or on Sunday.

Moreover, veteran striker Filippo Inzaghi is also in buoyant mood and is one goal away from becoming the record goalscorer in UEFA competitions - he is currently level with German great Gerd Muller on 62 goals.

Inzaghi is set to partner Alberto Gilardino up front.

"Regardless of tomorrow's game, Inzaghi will have other opportunities to surpass Muller," said Ancelotti.  "He really wants to do it and we hope he will be able to do so tomorrow."

The Rossoneri welcome back midfielder Massimo Ambrosini, who missed last week's draw at Benfica through suspension.  However, they will be without injured trio Marek Jankulovski, Emerson and Serginho.  Agencies