Chelsea scout Piet de Visser has again slammed Manchester United's purchase of Sporting Lisbon winger Nani.

"Of course we knew about Nani for a long time," he told Tien TV.

"He is a talent, but if you look at the European Championship in Portugal and the current tournament in the Netherlands - Nani has not shown any progress.

"Therefore I think Manchester United have paid too much money for a player who has talent, but has not developed since last year."