Grigor Dimitrov of Bulgaria reacts after winning the first set in his quarter final match against Jurgen Melzer of Austria during the Brisbane International tennis tournament held in Br

 

              Grigor Dimitrov of Bulgaria reacts after winning the first set in his quarter final match against Jurgen Melzer of Austria during the Brisbane International tennis tournament held in Br
Grigor Dimitrov of Bulgaria reacts after winning the first set in his quarter final match against Jurgen Melzer of Austria during the Brisbane International tennis tournament held in Brisbane, Australia, Friday, Jan. 4, 2013. (AP Photo/Tertius Pickard).