The second annual ATP Cup team competition is upon us, and in addition to ATP stars making their first big appearances of the season, some special guests will share the spotlight in the captain's spot.
Captains are chosen by the No. 1 singles player on each team, and they have on-court–coaching privileges in addition to the duty of determining the doubles pairings.
The decision can go in many different directions. For example, Stefanos Tsitsipas, Dominic Thiem and Alexander Zverev all decided to keep in the family, with Tsitsipas and Thiem each choosing their fathers, Apostolos and Wolfgang, and Zverev going with older brother Mischa.
(Apostolos found himself unexpectedly in the spotlight during the 2020 edition, when Stefanos accidentally grazed his dad's arm on an angry racquet smash.)