In their first year in charge of Chelsea, Todd Boehly and Clearlake Capital have spent approximately £644m on new players – £266m last summer, £282m in January and another £96m already in this window. With just £54.5m recouped from sales last season and a huge squad in need of cutting back under new head coach Mauricio Pochettino, Chelsea have let several big names depart this summer. But have they sold wisely?