Three executives from the WTA and ATP tours have either left or will leave their positions at the end of the year, TENNIS.com has learned.

WTA Chief Marketing Officer Andrew Walker will leave his post at the end of December after 10 years on the job and is hoping to stay in the sports industry, possibly in tennis. Walker was originally hired by former WTA CEO Larry Scott, who left for the Pac-12 college athletic conference. Walker’s position will not immediately be filled.

WTA Head of Communications Chris Wallace was recently let go by the organization.

Daily Tennis is reporting that Andre Silva, the ATP World Tour’s Chief Player Officer and Tournament Director of the Barclays ATP World Tour Finals for the last two years, will leave at the end of December and work with Roger Federer’s agent, Tony Godsick. The Brazilian has been with the ATP since 2000. The organization recently hired a new CEO, Chris Kermode, who worked with Silva at the ATP World Tour Finals, but it’s possible that Kermode also wants to bring in a new team.