Robert Lewandowski, Borussia Dortmund
Who's interested: Arsenal, Chelsea, Manchester United, Tottenham
Price tag: £20m
How likely to move: At least four Premier League clubs are thought to have registered an interest in the Poland striker, who was the leading goalscorer in the Bundesliga for Borussia Dortmund last season. He continued that good form with the first goal of Euro 2012.