Kaká scored 10 goals in the 06/07 Champions League campaign, leading Milan to victory.
He defeated Manchester United in the semi-finals, winning 3-0 at San Siro.
What happened?
Kaká took on the mantle of leading the Rossoneri attack after Shevchenko's departure to Chelsea.
He scored two crucial goals in the first leg of the Champions League semi-finals against Manchester United.
Why it matters for Kaká
Kaká's performance against Manchester United showcased his quality football skills.
He was in unreal form, and his goals helped Milan secure a 3-0 win at San Siro.
What comes next?
Kaká's Real Madrid career was affected by injuries, but he remains a top Brazilian goal scorer.
He showed glimpses of his old self in a recent performance against Deportivo La Coruna.
Kaká's spellbinding performance against Ajax made him the top Brazilian goal scorer in the Champions League.
He is still considered one of the best finishers around, with sweetly timed goals from midfield.
And despite being on the wrong side of 30, Kaká can still create magic as a sub.
He can prove to be a decisive game changer in upcoming clashes, including the one at Old Trafford.
But Kaká's treatment by Jose Mourinho and Real Madrid has been questioned.
Fingers have been pointed at them for benching and dropping him from the squad.
So Kaká's future remains uncertain, but his past performances are a testament to his skills.
He will always be remembered for his feats against Manchester United, particularly the 3-0 win at San Siro.
Kaká's recent performances have shown that he still has a big game left in him.
If given a chance by Mourinho, he can make a difference in the upcoming clash at Old Trafford.
On March 5th, memories of that fateful night in Milan will surely flash in the minds of United fans.
Kaká will remember his feats against Manchester United all too well, and will be ready to create more magic.