Celtic are in the hunt for a left-back this window and now look set to step up their efforts to land competition for Greg Taylor. January can be a tricky sell for many clubs when it comes to offloading key players; however, it can also be an appropriate opportunity to land targets when they become available and offload fringe men, which is something Celtic are keen to achieve. Brendan Rodgers had a habit in his first spell at Parkhead for ensuring that two quality players fought it out for every position. This season, it must be said, hasn’t lived up to that billing so far and the Irishman has…