Chelsea have attempted to secure an advantage in the race to sign Christopher Nkunku from RB Leipzig by arranging for the striker to undergo medical tests ahead of a proposed move, sources have told ESPN.

Nkunku, 24, has attracted interest from several top clubs, including Manchester United, Real Madrid and Bayern Munich.

But Chelsea have attempted to position themselves at the front of the queue after overseeing private tests in Frankfurt a few weeks ago with a Chelsea orthopaedist present.

When asked for comment by ESPN, sources close to Nkunku insisted there was no agreement with Chelsea, or any other club, and any medical checks were routine for all players at the club.