Marco Silva says Everton’s failure to land central defender is a risk

• Club signed seven players with net spend only £28m
• ‘It was a tough transfer window for us, 18 senior players left’Marco Silva said Everton have taken a risk in not signing a central defender this summer and their portrayal as one of the Premier League’s big spenders is misguided.Only Arsenal, Aston Villa and the two Manchester clubs invested more money in fresh talent during the transfer window than Everton, who signed seven players at a combined cost of &po