World number one Caroline Wozniacki will play in next month\'s Sydney International for a fourth consecutive year, organisers said on Thursday. The 21-year-old Danish star, who finished as the top-ranked player for the second straight season, joins US Open champion Sam Stosur and French Open winner Li Na at the January 8-14 event. Wozniacki claimed six WTA Tour titles this year and had semi-final appearances at the Australian Open and US Open.