Nathaniel Brown is a summer transfer target for Chelsea, who face competition from Manchester United, Arsenal, and Bayern Munich for the Frankfurt defender. Chelsea's pursuit of the German international is dependent on the sale of Marc Cucurella, as a move for a new left-back will not happen unless he is sold. Frankfurt are in a strong negotiating position as Brown has no release clause in his contract which runs until 2030, and the club is expected to demand a fee of around £52 million.