Jelena Ostapenko is now working with experienced WTA coach David Taylor, the Latvian told local press this week.
Ostapenko had been working with Anabel Medina Garrigues, who stopped coaching the 20-year-old because she was appointed Spanish Fed Cup captain.
The two began working together during the clay-court season, and Medina Garrigues helped Ostapenko to a surprise win at the French Open.
"I've been practicing with David Taylor for two weeks," Ostapenko told Latvian press.
Congratulations to the best coach and the best player of the year in Latvia:— Jelena Ostapenko (@OstapenkoJ1997) December 14, 2017
Coach of the year: Jeļena Jakovļeva ????
Player of the year: Aļona Ostapenko ???? pic.twitter.com/CEFi1DuVdP
Ostapenko also said her mother, Jelena, would remain her day-to-day coach.
Ostapenko is ranked No. 7 on the WTA Tour.