Portsmouth boss Harry Redknapp has branded new signing Lassana Diarra as "world class".

"Lassana without a doubt is world class. He's just quality, you only had to see the Derby game to realise that," said Redknapp. "He broke up attacks, he's strong, energetic and worked really well with Pedro (Mendes).

"You don't play for France in midfield if you are not a good player and he's quality."