Sami Hyypia - Liverpool
The Finn was a complete unknown when he joined Liverpool in 1999 from Dutch side Willem II and there was plenty of scepticism around his arrival. But he quickly formed an excellent partnership with Stephane Henchoz proving to be the bedrock of Gerard Houllier's side.
In 2001, he played a leading role in the treble success of the FA Cup, League Cup and UEFA Cup where Liverpool's defensive credentials were often tested to the limits. He still plays his part in the current Liverpool team with an excellent defensive partnership with Jamie Carragher.