His career includes four ATP singles titles and two 2016 Rio Olympics medals. Sock was also ranked No. 8 in the world in singles in 2017 and the No.2 doubles player in 2018.

On this week's episode, World No. 23 Jack Sock recaps his season and talks about 2017 goals, politics in the locker room, status of his doubles game and more.

Sock speaks about Shelton According to former world No. 8 Jack Sock, his compatriot needs to solve a weakness if he wants to aspire to win a Major title in the near future.

The Pick: Rafael Nadal vs. Jack Sock, Citi Open second round On the comeback trail, Sock—a former Top 10 player—finds himself in his first marquee match-up in years against the world No. 3 in ...

For the 2017 season, Sock will continue to work with Hahn full-time but he has also signed Wolf on in a more extensive role, as he will travel with Sock for six to 10 tournaments during the year.