ZHUHAI, China (AP) — A year after finishing the season as the No. 1-ranked player in the world, Angelique Kerber will be playing at the WTA Elite Trophy with an eye on 2018.

Kerber won the Australian Open and U.S. Open last year, but has struggled in 2017 and has dropped to No. 19.

"I'm not trying to look back at the year. I'm trying to look ahead and trying to end the year as well as I can by putting everything on the court, winning as many as matches as I can and going to my holidays with a good feeling," Kerber said. "It's a tough tournament but it's an opportunity to get better, have good competition and maybe also going with a good feeling to next season."

The WTA Elite Trophy is a round-robin tournament for the top players who failed to qualify for the WTA Finals. The tournament splits 12 players in four groups of three, with the group winners reaching the semifinals.

Kerber is in a group with Anastasia Pavlyuchenkova and Ashleigh Barty.

Other players at the tournament include U.S. Open champion Sloane Stephens, who is in a group with Anastasija Sevastova and Barbora Strycova.

"I just want to compete well because obviously every match is really important," Stephens said. "I just hope to play well and get in a few matches out there."

In the other groups, it's: CoCo Vandeweghe, Peng Shuai and Elena Vesnina; and Julia Goerges, Kristina Mladenovic and Magdalena Rybarikova.

The 12 players at the tournament won a combined 11 WTA singles titles in 2017.