Andy Murray appeared to declare that retirement could be close during his Qatar Open defeat to Jakub Mensik on Wednesday. The three-time Grand Slam champion was picked up by TV cameras saying ‘This game’s not for me anymore’ during the second round clash. Murray won his first match since last October on Tuesday, beating France’s Alexandre Muller in straight sets in the first round. He will have harboured hopes of going deep into the competition in Doha after an extremely difficult few months on the court. He dropped the first set against 18-year-old Czech star Mensik and was often seen venting…