BASTAD, Sweden (AP)—Top-ranked Serena Williams advanced to the second round of the Swedish Open by beating Sesil Karatancheva of Kazakhstan 6-1, 6-2 on Tuesday.

Williams broke the 131st-ranked Karatancheva's serve five times to advance at the clay-court tournament on Sweden's west coast.

Third-seeded Klara Zakopalova of the Czech Republic, sixth-seeded Lesia Tsurenko of Ukraine, Mathilde Johansson of France, Anna Tatishvili of Georgia, Teliana Pereira of Brazil and Richel Hogenkamp of the Netherlands also advanced.