The Spaniard has been linked with Ivory Coast striker Arouna Kone, Paraguayan defender Antolin Alcaraz and promising English winger Callum McManaman and has confirmed he is still after the trio.
"They are players that I know really, really well," told the club's official website. "I worked with them really closely and they are players that are used to the Premier League and the British game.
"I think [Everton] need to bring in three or four new faces - one per unit, and make sure we get an extra option or dimension into the squad.
"We need to remember that we have a very strong team at the club, but in the same way we don’t want to close the window without feeling stronger than we were when the window opened."