Wind back 7 years and we have one of the most exciting and talented up and coming players in the game.
Aged 20 he was threatening the world's top 20 whilst exciting fans and players alike with his genius and charisma on court. He defeated Andy Murray in fine style (Indian Wells 2011) demonstrating this aforementioned potential. Dynamic, Powerful and condifent summed up his game, until he faded away in 2011 and lost 17 matches in a row which is undeniably embarrassing for a player of his talent.
What went wrong? Personal problems lead to his confidence and genius taking a hit? Maybe he fell out of love with the game? Maybe he wasn't training properly?
Despite these ups and downs I have a feeling a Grand Slam final may be coming his in 2014 if he can sort out his mentality.