Manchester City boss Mark Hughes says the arrival of Blackburn Rovers striker Roque Santa Cruz is a critical signing.

The South American completed a £17million move from Blackburn after a lengthy medical earlier on Monday.

It was Hughes' second big signing of the summer, following the arrival of Gareth Barry from Aston Villa.

And, while the City chief has already highlighted Barry's leadership qualities, he is convinced Santa Cruz can be just as important an addition to a swiftly improving squad.

"It was really important that we signed him because it's an area of the squad that we have needed to address for some time," Hughes told the club's website.

"The qualities Roque brings will be of great benefit.

"His ability in the air and his physical presence are things we have been missing. But he also has technical ability and good pace for a big man.

"He is a very good player and one I know well from our time at Blackburn."