Everton are chasing Sunderland goalkeeper Jordan Pickford.
The Sun says Sunderland keeper Pickford, 23, has attracted interest from Premier League heavyweights Manchester City, Tottenham and Arsenal.
But Goodison gaffer Koeman has made the first serious move in the race for £15m-rated England Under-21 star.
The Black Cats are currently seven points adrift of safety at the bottom of the Premier League.
And they are likely to cash in on youth product Pickford if they go down at the end of the season.