Chelsea defender Paulo Ferreira has backed his Portuguese compatriot Jose Bosingwa to succeed at Stamford Bridge.
Right-back Bosingwa sealed his £16.2million switch from Porto to The Blues in May.
The 25-year-old is expected to compete for a starting berth with Ferreira and Juliano Belletti in the new season.
And Ferreira believes Bosingwa will add much to the Chelsea squad in their hunt for glory.
"He is a fast player, which I know from Porto because I played with him there,' Ferreira told the club's official website.
"He was very young when I was there and now he is proving he's a good player.
"He has improved a lot over the last few years, so I think he is a player who will help us a lot."