Hobart, Australia: Serena Williams won her second straight match in her comeback after a four-month injury layoff, beating Lucie Safarova 6-3, 3-6, 7-6 (5) on Tuesday at the Hobart International.Playing just 18 hours after her first-round, straight-sets win over Sofia Arvidsson of Sweden, Williams took advantage of Safarova's poor serving. The Czech player double-faulted on her first serve in the third-set tiebreaker, then again to give Williams a match point.Williams, recovering from ankle and knee injuries, has not played a tournament since the U.S. Open in early September. She fell behind 4-1 in the second set before holding a break point to level at 4-4, but Safarova held on to take the set. Williams had her service broken in the opening game of the deciding set before pulling back even at 3-3 on the way to the deciding tiebreaker."I was really happy to win because I wasn't ready to go home yet," Williams said. "I want at least one more match here before the Australian Open. It just boiled down to me not making as many mistakes."In other second-round play on Tuesday, top-seeded Anna Chakvetadze beat Russian compatriot Olga Poutchkova 7-6 (6), 7-5 and India's Sania Mirza defeated Romina Oprandi of Italy 6-7 (2), 6-3, 6-0.Two seeded players lost in the 32-women tournament that is being used as a warmup for the Australian Open that begins next Monday in Melbourne.Sybille Bammer of Austria, who will play Williams in the quarterfinals, beat second-seeded Anabel Medina Garrigues of Spain 6-4, 6-3 and Catalina Castano of Colombia defeated fifth-seeded Mara Santangelo of Italy 6-3, 6-2.Seventh-seeded Zheng Jie of China beat Severine Bremond of France 6-1, 6-3.