Manchester United legend Ruud van Nistelrooy insists Alexander Buttner will prove his quality.

After being bought as cover for Patrice Evra, the defender has already admitted he is pleased with his first months in Manchester.

"Alexander has made a great start," van Nistelrooy told ManUtd.com. "He needs a bit more time as he's definitely somebody for the future.

"He's been getting games in the Champions League. For him, it's a dream come true. He's got the ability and needs to learn to obtain more experience and he's definitely somebody to look out for."