Madrid have rejected a €35m (£25m, $38m) bid from Manchester United for Atletico Madrid goalkeeper Jan Oblak, according to Marca.
The Spanish publication reports that United had earmarked the keeper as their number one choice to replace David de Gea should the goalkeeper decide to leave. However, Atletico have refused to relent and have told the Red Devils about their desire to keep their best players in the squad this summer.
The keeper made 22 appearances for the Spanish club last season and has been billed their number one choice for the upcoming campaign. The Red Devils need a commanding keeper at the back of their defence, as was evidenced last season, when De Gea single-handedly saved them from a number of tight situations at the back.
Inducted into the Team of the Year last season, his absence will be a major blow to United's title hopes, having recruited admirably in the transfer window.
The Dutchman confirmed that he would be in the market for at least two more players to replace De Gea and Angel Di Maria, with the Argentine completing a move to Paris Saint-Germain earlier this week.
When asked if they are still in the market, Van Gaal told United's official website, "Yes, because I have said that we need players with speed and creativity – Di Maria is a player like that and now he is gone, so we need that type of player."
"Of course we have problems still with the goalkeeper, so we need maybe two more players."
United are likely to move back in for Jasper Cillessen, who has recently revealed in an interview that he would be willing to make the trip to Old Trafford should an opportunity present itself.
Cillessen is acquainted with the 64-year-old Dutchman, having worked with him during the World Cup, with Ajax stating that they are unlikely to be able to hold him back should an offer come their way.