Everton are in talks with Porto about signing attacker Yacine Brahimi, according to Sky sources.
It is understood the Toffees are very interested in the 26-year-old Algeria international and talks have progressed well.
However, Sky sources understand convincing the player to make the move to Goodison Park is proving more problematic because his preference is a move to one of England's Champions League clubs.
It is believed Brahimi, who has scored 21 goals in 77 appearances for the Portuguese club, already rejected a big money offer from China this summer, and Porto left him out of their Champions League squad in midweek.
Everton are in the midst of a major recruitment drive following a change of ownership at the club, and have so far signed four senior players - Maarten Stekelenburg, Yannick Bolasie, Idrissa Gueye and Ashley Williams - and four youngsters.
Sky sources understand they are also interested Manchester City goalkeeper Joe Hart and Sunderland centre-back Lamine Kone.
Everton, who have so far not commented when contacted by Sky Sports News HQ about Brahimi, could also offer striker Romelu Lukaku a new contract after he said he wanted to stay at the club.