When chair umpires/tennis refs make horrible calls and end up influencing the outcome of a tennis match. Gotta feel sorry for some of the umpires sometimes, these balls are flying at an incredible speed, but some of these mistakes are unforgivable. Mohamed Lahyani, Carlos Bernardes are probably the GOATs but they've had some tough mistakes haha
0:00 Wawrinka
1:25 Fils
2:13 Murray
3:56 Isner
4:47 Nadal
6:27 Khachanov
7:11 Coric
8:09 Sinner
9:21 Borges
12:58 Auger Aliassime