Juan Martin del Potro claimed two ATP titles on an indoor court in the closing stages of 2012. The Argentine conquered Vienna and Basel and qualified for the ATP Finals, his first season’s ending event in three years. Juan Martin ousted Janko Tipsarevic and Roger Federer to advance into the semi-final and set the clash against world no.1 Novak Djokovic. Del Potro made a great start against Djokovic and opened a 6-4, 2-1 advantage, controlling the pace and looking good to advance into the title clash. Instead, the Serb raised his level and sailed through the rest of the encounter for a 4-6, …