Manchester United's hopes of signing Marco Reus this summer have suffered a serious setback after the German playmaker penned a new four-and-a-half year contract with Borussia Dortmund. The Bundesliga giants confirmed on Tuesday morning that the 25-year-old midfielder has committed his future until 2019, and crucially the £20m release clause inserted in his previous deal has been removed. Louis van Gaal was eager to bring Reus to Old Trafford at the end of the season, but the Red Devils could now be forced to pay upwards of £50m to make the move possible. Real Madrid, Barcelona, Bayern Munich and Arsenal have all been mooted as admirers of Reus as well, and will be similarly disappointed to hear about the latest show of loyalty that has become increasingly rare in the modern football era. Dortmund have endured a disastrous season with Jurgen Klopp's side languishing near the bottom of the table, but that hasn't deterred Reus from renewing terms.