Chelsea could find themselves in the market for a new left-back in January as questions persist over the long-term future of Ashley Cole. The 32-year-old, who joined the Blues from Arsenal in 2006, is set to be out of contract at the end of the season and his long-term future is yet to be set in stone. Cesar Azpilicueta has been preferred over Cole at left-back in recent weeks, while the England international hasn't played a game in over a month. And, just yesterday, former Three Lions star Stuart Pearce said he believes Cole has a fight on his hands to displace Everton's Leighton Baines and make it to the World Cup finals as part of Roy Hodgson's 23-man squad next summer. 33 later this month, Cole cannot go on forever, and Chelsea's recent defensive problems - they have conceded six times in their last two Premier League games - are perhaps indicative of the fact they still have no natural successor to the veteran. However, with a January transfer window looming on the horizon, there is an opportunity for Jose Mourinho to consolidate at fullback, and here, we take a look at 5 Left Backs Who Could Replace Ashley Cole. Click "Next" to get started.