datasport doesn't usually do ratings for CL games but goal.com's italian page has done. (
link)
Here are mine:
Dida: Good saves. he's got his mojo back. 6.5
Bonera: for someone who's not a natural RB, he did awfully well shutting the offense on his side down. 7
Nesta: Nesta was...his usual self. Very good. 7.
Kaladze: Despite the headbang with Dida, no real mistakes to speak of. Went forward a couple of times. Probably 6 - 6.5.
Serginho: Not a lot of effectiveness on offense and, well, the guy's a winger and not a defender. 5.5.
Gattuso: Snarling and tenacious as usual, but nothing absoulutely stellar. 6.
Pirlo: Beautiful passing and one hell of a good job dispossessing Shakhtar of the ball that led to an assist and Pippo's first goal. 7.
Ambrosini: Usually always somewhere around a 7, but not today. Dumb fouls and just seemed out of his depth. 5.5.
Turtle: Decently well, but not the sparkling performances he's had in the last few games. 6.
Kaka: Kicked to death like a number of other Milan players, but didn't need to retaliate and get that yellow. Nicely taken goal and selfless assist to Pippo for his second. 7.
Gilardino: Just doesn't have the bloody-mindedness for CL play, I think. Couldn't find a way around a very determined Shakhtar defense. 5.5.
Pippo: Involved in all 3 Milan goals. Scored the first after 90 seconds on the pitch, assist on the second, scored the third and tied Gerd Muller's record. Pippo really is an immortal. 8.