Everton are showing interest in Middlesbrough midfielder Marten de Roon.
The 26-year-old Dutchman has impressed Premier League rivals this season following his £12million move from Atalanta.
Jose Mourinho in particular singled him out for praise and hailed his 'phenomenal' workrate following Manchester United's hard-fought win at Boro in March.
Though he arrived with a midfield enforcer reputation, De Roon has played in a more advanced role for most of the season and Everton scouts checked on him during last Monday's defeat at Stamford Bridge.