Muguruza beats Pennetta at Tournament of ChampionsPost-BulletinSOFIA, Bulgaria (AP) — Garbine Muguruza moved a step closer to the semifinals by beating favorite Flavia Pennetta of Italy 0-6, 6-1, 6-1 in the group stage at the season-ending WTA Tournament of Champions on Thursday. The Spanish player, who broke ...and more »