Australian coach Craig Tyzzer has been coaching Ashleigh Barty since 2016. Tyzzer, who is in his 60s, played professional tennis between 1979 and 1983. He won the WTA Coach of the Year in 2019.

In 2016, Ashleigh Barty returned to tennis after a hiatus from the game to play cricket. That’s when her coaching relationship with Tyzzer started. Starting at the lower tier events, Barty quickly found her gear under Tyzzer’s tutelage and started climbing up the rankings.

She has won two grand slams and reached the world number 1 ranking during her partnership with Tyzzer. When Barty took a 11-month break from tennis due to COVID-19, Tyzzer arranged matches for Barty against male tennis players to keep her competitive.

When asked what impressed him most about Ashleigh Barty, Tyzzer said:

I think the fact that she’s just been able to compete non-stop, like she’s actually put herself in situations and just competed point by point. I don’t feel like she got ahead of herself – maybe once. But she’s just been able to nail that side of it where she’s just competed point by point every match, played it on its merits, and it’s worked for her.

Barty likes stability in her team. Even when things are not going her way, she believes in the team that is supporting her.

Stefanos Tsitsipas will play doubles with Pakistani player Aisam-ul-Haq Qureshi at the Paris Masters. Qureshi, who is 41, doesn’t have a stable doubles partner and has played doubles with multiple partners in 2021.

Qureshi is an accomplished doubles player. He has won 18 doubles titles in his career. He reached the finals at the 2010 US Open with partner Rohan Bopanna. The pair lost to Mike and Bob Bryan in the finals. His doubles ranking peaked at world number 8 in 2011.

Stefanos Tsitsipas‘ main focus has been on singles, though he occasionally plays doubles on the tour. He is currently ranked world number 141 in doubles.

Top singles players rarely play doubles. They occasionally compete in doubles to improve their net game and as a preparation for Davis Cup or Olympics, where they may compete in doubles.