Australian Open top seed Serena Williams showed she was back to her Grand Slam best Tuesday, as former world number ones Caroline Wozniacki and Victoria Azarenka set up an enticing second-round clash. Eighteen-time Grand Slam champion Williams shook off her erratic early season form to sweep into the second round at Melbourne Park, demolishing Alison Van Uytvanck of Belgium 6-0, 6-4.
Petra Kvitova, seeded four, Agnieszka Radwanska (six), Wozniacki (eight), last year's finalist Dominika Cibulkova (11), and Venus Williams (18) were among the other seeds to advance. But the upsets that marked day one of the season-opening Grand Slam continued with first-round exits for former world number one Jelena Jankovic (15), Andrea Petkovic (13) and Flavia Pennetta (12). Serena Williams, 33, is chasing a fifth Australian title that would take her Grand Slam tally to 19, placing her outright second on the all-time Open Era list behind Steffi Graf's 22.