Nesta a sweeper ? I wouldn't call him that..
To descibe Ujfalusi : He is a typical central defender. Physically strong, very good in heading, marking and positioning. Good technical skills, too but he is not the fastest guy ( though clearly fast than a guy like Tudor, but no rocket..). But he is not a 'spectacular' player, if you know what i mean. He's not a player who is going to attack, e.g. like Bayer Leverkusens Brazilians Lucio ( who was often connected to Juve in the german press..)and Juan. He is very dangerous with his head after corner- and freekicks though ...
He has leading skills and a very good and professional attitude, never made any trouble here in Hamburg. And he has a very beautiful wife

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To be honest i don't know if he is really better than Tudor, at least if we are talking about the Tudor which was great 2 or 3 years ago. What happened to Tudor anyway, why didn'tt he play more often recently... ?
@Torkel : right

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