 Complete the following phrase:  At the 2013 Six-red World Championship he defended his title by defeating Neil Robertson 84 in the final. Only a week later he won his next tournament, the General Cup in Hong Kong, beating Robertson again in the final, this time by 72. A second ranking event quarter-final of the year came at the Shanghai Masters with comfortable 52 and 51 victories over Ali Carter and John Higgins. However, he then squandered a 42 lead over Xiao Guodong to be beaten 54. At the Masters he forced a decider in the first round against Mark Selby, having been 40 down but lost the 55-minute final frame to be defeated 65. In the quarter-finals of the 