Chelsea

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Snap judgement suggests Frank Lampard was the window's big winner.

Looking to close the gap on Liverpool, Lampard convinced Blues owner Roman Abramovich to bankroll a 200 million spree that landed German forwards Timo Werner and Kai Havertz, Ajax playmaker Hakim Ziyech, Leicester defender Ben Chilwell, Rennes keeper Edouard Mendy, plus Thiago Silva on a free transfer.

Whether Lampard will be able to gel those new signings into a cohesive unit is the question that will define Chelsea's season as a success or failure.