Zverev, Federer and the incredible ball boy drama - 2018 ATP Finals
A point was re-played on the second set tie-break

This was a moment pic.twitter.com/iYeIn4cwSJ
— José Morgado (@josemorgado) 17 novembre 2018
The eighth point of the second set tie-break between Roger Federer and Alexander Zverev was probably the key for the second set result and maybe match as well. Leading 4-3 with Zverev on serve, Federer hit a backhand, behind him a ball boy lost the ball and took it by moving himself, the German interrupted the rally as he got distracted and the point got re-played. Federer complained with the chair umpire Carlos Bernardes.