Marina Granovskaia is the silent force behind Chelsea's transfer business.
Born in Russia, she has spent the past 18 years working alongside Roman Abramovich in various roles but moved to London shortly after he bought Chelsea Football Club in 2003.
Her official title is director, though Granovskaia is more precisely in charge of player transactions - a role she has thrived in.
From the £50million signing of Fernando Torres to the £60m sale of Oscar, she has been the brains behind big-money headlines.
West Ham’s Karren Brady may be the most high-profile woman in English football but Granovskaia is the most powerful.