Arsenal have been told to up their offer for PSG defender Mamadou Sakho.

The 19-year-old has been linked with Barcelona and Bayern Munich but has made it clear his preference is to join Arsenal. His agent Tim Hager, however, says Arsenal's valuation is "too cheap".

Hager said: "He will be moving clubs this summer. Arsenal are interested, but the club are too cheap at the moment. A transfer will happen soon. He wants to play football in England and Arsenal are a good club. They want him the most. Bayern Munich are a top European club, so I think it will be Bayern or Arsenal."