The transfer window is the only time football teams can buy new players . Real Madrid and Barcelona are likely to be the biggest - selling teams . New manager Carlo Ancelotti is bound to have brought a shopping list with him and the club 's Russian billionaire owner Roman Abramovich will want to show that he still has the financial muscle to compete on the transfer money-go-round . Arsenal and Newcastle United will be looking to sell some of their stars .
The transfer window is the only time football teams can buy new players . Real Madrid and Barcelona are likely to be the biggest - selling teams . Arsenal and Newcastle United will be looking to sell some of their stars .