Celtic left it late to see off Aberdeen yesterday at Parkhead. Summer signing Derk Boerrigter was on hand to score in the first minute of added time to take the score to 2-1 before Kris Commons scored his second and Celtic's third before the final whistle was blown. Boerrigter thinks Celtic may have to show similar patience when they meet AC Milan on Tuesday in their Champions League game. Celtic are bottom of Group H with just three points from four games and, with a trip to face Barcelona in their final group game next month, need to beat AC Milan to have a realistic chance of reaching the last 16 of the competition for the second successive season. Boerrigter believes it can be done.He said: "Yeah I think so. We are playing at home, we will have the fans behind us and there is quality in the team. We have to play our own game and (if we do) we can win. It is good that we can be patient and have the qualities to score goals in the final minutes.I would rather do it comfortably than wait for the final minute but I will take the win."Manager Neil Lennon expects to have additional firepower for the visit of Milan. Winger James Forrest will be back from a hamstring injury and striker Anthony Stokes will return after missing the Dons game due to personal issues. However, Lennon was pleased to see the form of goalkeeper Fraser Forster, whose late save from McGinn, when he tipped a strike by the former Celtic player onto the post, was a probable game-saver. Lennon praised his number one who recently made his England debut in the 2-0 defeat to Chile at Wembley. He said: "There are only a few 'keepers who can make that save and he is one of them. It even got a bounce before which makes the save even more outstanding. I thought he could have come for their goal but if there is any blame to be attached he certainly redeemed that with a world-class save."Aberdeen returned to the Granite City still looking for their first league win at Celtic Park since 2004. However, manager Derek McInnes took plenty of positives from his side's performance, despite the result dropping them to fifth place. He said: "When it is 1-1 with a few minutes to go (in the future), we would like to think that it is Aberdeen who goes away with three points. That's what we are working towards and I feel we are making way to becoming that team. I felt there was a determination to win the game instead of settling for a point and (in) another game it could have been a win for us. We have a lot going for us at the minute. We are not where we want to be but we are working towards that."