4) Marco Reus (Borussia Dortmund)
Another possible alternative for United, should they choose to ditch Falcao, is to join the chase for one of the most wanted men in European football, Marco Reus, who will be available for as little as £20m next summer due to a clause in his contract. For United fans, the prospect of seeing Angel di Maria, Juan Mata and Marco Reus in a trio behind either Wayne Rooney or Robin Van Persie must be a tempting one. It would certainly expand their attacking options, and allow Van Gaal to have several different approaches to games at his disposal.