From Jack Grealish to Yan Diomande: Our 15 favourite signings of the summer window

The summer transfer window has closed across Europe, with a record-breaking £3.5billion going on sales in the Premier League alone. The spending was driven by the biggest clubs in England and Spain, several of which engaged in ambitious rebuilds. Continent-wide, six players moved for fees in excess of €100million (£86m; $116.2m) and, according to Transfermarkt, there were 262 signings for €10m (£8.6m; $11.6m) or more. But which of these moves have stood out? We asked some of our experts to pick their favourite transfers of the past three months, and to explain their choice. Mamadou Sangare has to be up…