troicki had succes?
relative to his career up to that point?
career high ranking of #12, career best result at a GS (4th rd), career best result at a Masters (QF), best win%, reached 2 finals for the first time ever. (thanks wikipedia)
Yes, 2011 was a success for him.
Could have been much better, even, he had an excellent chance at a SF at the French Open, as crazy as that sounds. And he should have done better at the USO.