Chelsea are interested in signing Lille goalkeeper Mike Maignan.
The 25-year-old is seen as a credible candidate to challenge Kepa Arrizabalaga for the number one position at Stamford Bridge.
However, Chelsea are yet to make an official bid for the player.
Maignan was an ever-present for Ligue 1 club Lille last season and would cost around €30m (£27m).
He has played for France at every international level from U16 to U21 and has also been called into the senior squad.
Chelsea signed Spain international Kepa from Athletic Bilbao in the summer of 2018, parting with a world-record fee for a goalkeeper.
But Kepa’s performances have come in for criticism and he was dropped in favour of the veteran Willy Caballero at times last season.