Everton are interested in Sporting left wing-back Ruben Vinagre, the ECHO understands.
The 23-year-old former Wolves player has been linked to a return to the Premier League and interest from the Blues is understood to be genuine.
Everton's director of football Kevin Thelwell is known to be a fan of Vinagre and oversaw him being handed a new deal while he was sporting director at Molineux. At the time he praised Vinagre's development on the pitch and his maturity off it.