One big piece missing from Del Potro's career is that he has yet to win a Masters title. In fact the U.S Open title is his only title above 500 level. The most famous invididual to not win a Masters title was Yevgeny Kafelnikov, a former World #1 and 2 time Slam winner, who completed his career having never won a Masters. Del Potro should win one at some point, as he is a far more talented player than the overachieving 2 slam winner Kafelnikov. When do you think Del Potro's first Masters title will be. Will it be this year sometime, in a later year, or never.