Chelsea could enter the transfer market in the summer to sign a new left-back. It has been a bit of a problem area for Mauricio Pochettino this season for multiple reasons. Ben Chilwell and Marc Cucurella have both picked up injuries in the current campaign, while the Argentine no longer has Ian Maatsen to call upon following his loan move to Borussia Dortmund in January. When everyone has been fit and available, Pochettino has actually used central defender Levi Colwill at left-back, so not everything looks perfect there at the moment. Regarding who Chelsea could sign, then, the Blues have be…