Garbiñe Muguruza is on top once again.

On Wednesday at the Akron WTA Finals in Guadalajara, Muguruza took home the title in the last match of the season, defeating Anett Kontaveit 6-3, 7-5.

She becomes the oldest year-end champion since Serena Williams seven years ago. She’ll finish the season at No. 3 in the WTA’s rankings.

“I’m just very happy I proved to myself once again I can be the best, I can be the ‘maestra,’ like how we say in Spanish,” Muguruza said in press. “That puts me in a very good position for next year, a good ranking.”

It’s been a long road since 2017, when Muguruza knocked off Venus Williams in the final at Wimbledon and held the No. 1 ranking for four weeks.

“The last couple of years, I didn’t play the same way I played before,” Muguruza said. “But I didn’t play a bad tennis, either. I was just here, there, not going into the deep rounds at Grand Slams that made the difference. I always felt I had the tennis. I was just not putting the battle together.

“I always believe I made finals of a Grand Slam, reached the rankings, I’m like, I have the tennis, I just have to show it.”

Muguruza is the first Spaniard to win at the WTA Finals.