MELBOURNE—Serena Williams says she will play a reduced schedule compared to recent years, concentrating on winning big titles.

Williams won the Australian Open to claim her 19th Grand Slam singles title. Once known for her selective playing appearances, she entered 16 tournaments in 2014, and in 2013 won a tour-leading 78 matches and 11 titles.

"I definitely am not going to play as much this year, and I'm just going to go for everything when I do," said Williams, who is scheduled to play Fed Cup this week in Argentina.

The 33-year-old is now looking at winning the French Open and Wimbledon, having increased her lead in the rankings. “Now that I got this under my belt, I’m a little more comfortable with my ranking now,” she said. “Now I can really move. Like I did so bad last year at Roland Garros, and Wimbledon as well. So those are the two I really have my eye on, because I would like to do better at those. And I know I can do better.”