Viktor Troicki impressed me in Washington tournament 3 weeks ago. He had good games winning Reynolds, Gremelmayr, Roddick, Kunitsyn, loosing only to "a man to beat" at the moment Del Potro. Then he had withdrawn from New Haven tournament with an injury, but I think it was minor one and looking at the schedule of the to New Haven tournament he really wouldn't want to progress further, and to prepare himself for a bigger tournament like US OPen.
Kohly is a good player, but according to what I've seen lately he is not up to his best. And odds definetely look tempting to me. Average stakes on Viktor.