AC Milan talisman Kaka is considered by many to be the world's best player.
But the Brazil international believes former Saints striker Peter Crouch could be the dangerman in tomorrow's Champions League final in Athens.
The 6ft 7in Crouch was not yet a Liverpool player when the Anfield side pulled off their stunning win over Milan in Istanbul two years ago, making the move from St Mary's later that summer.
However, 25-year-old Kaka believes 26-year-old Crouch's addition to the squad since that epic win gives Liverpool an extra dimension.
Crouch has scored 29 goals in two seasons for Liverpool, including six in Champions League campaign this season, following his £7m move from Saints.
In addition, he has scored 11 goals for England.
Kaka said: "He (Crouch) is a dangerous player in the air, when the ball is in the area he's always an opportunist.
"We have to pay attention to him if he plays".
Not that Kaka is anticipating an easy ride if Liverpool manager Rafael Benitez should decide to keep the England striker out of his starting line-up.
"If a different one plays there will be other things we have to worry about," said Kaka.
The Brazilian said the dramatic defeat of 2005, when Milan lost on penalties having led 3-0 at half-time, had no bearing on his thinking ahead of the two teams' rematch in Athens.
"For me the motivation is to get to a final and have the possibility of winning the Champions League," he added.
"Everyone's talking about revenge for what happened in 2005. I think what happened is a thing of the past.
Kaka also revealed a begrudging respect for the Anfield side's often-criticised style.
"Liverpool, differently from Manchester United, play a game that's very characteristic of English football," he said.
"They're a very well-trained team by Benitez and a very tactical team, they mark tight and have all the traits of an English team.
"Steven Gerrard is an excellent, modern player because he's a player who runs, marks, knows how to pass, cross, score goals, and is a leader in the field for Liverpool.
"He's a player that I'd like to have in my team".
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