Feyenoord technical director Martin van Geel has given up on re-signing Manchester City striker John Guidetti.
The Swede was outstanding on-loan at Feyenoord last season.
Van Gaal accepts Guidetti is unlikely to return, but may ask City for another striker prospect in his stead: "We are very happy that we have strengthened our squad before the first training session will take place, but we will continue our search. However, we want to sign a striker."