The Ukrainian was displeased with the decision to move Ukraine's tie with Belgium to neutral ground.
Chinese pioneer took part in an emotional farewell ceremony in Beijing.
The Brit, who retired earlier this month, takes on a leadership role in the ATP.
Last week's title winners weren't the big movers in the rankings.
The Ukrainian had some fun with serves on Instagram.
The Brit had been with Adidas for most of her career.
During a return to her native Wuhan, Li Na talked about the impact of her father's death on her career.
