By Tom Gott Thibaut Courtois was back in Real Madrid training on Friday to offer a glimmer of hope that he could return in time for Sunday’s El Clasico. The goalkeeper has been dealing with a back injury which has kept him out of the team’s last four games in all competitions, with the upcoming meeting with Barcelona initially seen as a possible return date. Courtois had been predicted to return to training earlier this week, so his absence led to some concerns that El Clasico may be out of his reach, but he continued to keep himself in the mix by finally making a return to a light session beh…