Alex Bogomolov Jr. of the United States advanced to the quarterfinals of the St. Petersburg Open on Thursday, beating Philipp Kohlschreiber of Germany 6-4, 3-6, 7-5. In his second consecutive quarterfinal appearance in two weeks, the seventh-seeded Bogomolov Jr. will play Serbian qualifier Dusan Lajovic, who recovered to beat Israeli wildcard Dudi Sela 2-6, 6-2, 6-1. More...