6. Salif Diao
Diouf’s Senegal team mate Salif Diao was also signed after the unfancied African nation surprised many at the 2002 World Cup. Even though he was relatively cheap at £5million, the midfielder was another flop in the Premier League, and it took the Reds years to finally get him off their books, with unsuccessful loan spells at Birmingham and Portsmouth before he finally moved down to the Championship with Stoke City.