BREAKING: Kiki Bertens, struggling with an Achilles injury, tells Dutch press she will retire at end of 2021:

“The right balance between the full energy I put in day in day out and the satisfaction it gives me is gone.”

After the Olympics, Bertens will decide on US swing. https://t.co/BictzbI88O

— David Avakian (@Davavaki) June 16, 2021