Arsenal got a lot of business done during the January transfer window. Of the six first-team players to depart either permanently or on loan, by all accounts, Calum Chambers' move to Aston Villa took many by surprise.
Four days before the transfer window closed, it was announced that after seven-and-a-half years, the versatile defender's time at the Emirates Stadium had come to an end with him joining Steven Gerrard's side for an undisclosed fee.
"Calum Chambers has joined Aston Villa in a permanent transfer for an undisclosed fee," a statement read on Arsenal 's official website. "Joining us from Southampton in July 2014 as a 19-year-old, Calum soon became a full England international, having previously starred for the Under-21s.