Throughout their history, Leicester City have not been known to break the bank on a transfer.
Before 2014, their record-breaking signing was Matt Mills from Reading, who joined for £5 million in 2011.
Arsenal's resurgence under Mikel Arteta has made the Emirates a destination for Europe's top players. We rank Arsenal's top five most expensive transfers of all time.
Manchester United are exploring the construction of a new 100,000-seater stadium at Old Trafford, with Sir Jim Ratcliffe seeking public and private investment.