- U.S. Open Cup
- U20 Championship (Rugby Union)
- U20 Six Nations
- UCI BMX Freestyle Flatland World Championships
- UCI BMX Freestyle Park World Championships
- UCI BMX Racing World Championships
- UCI BMX World Championships
- UCI Cyclo-cross World Championships
- UCI Cyclo-cross World Cup
- UCI Gran Fondo World Championships
- UCI Indoor Cycling World Championships
- UCI Mountain Bike Cross-Country Marathon World Championships
- UCI Mountain Bike Cross-Country World Championships
- UCI Mountain Bike Downhill World Championships
- UCI Mountain Bike World Championships
- UCI Para-Cycling Road World Championships
- UCI Para-Cycling Track World Championships
- UCI Road World Championships
- UCI Track Champions League
- UCI Track Cycling World Championships
- UCI Track Nations Cup
- UCI Trials World Championships
- UCI Women's World Tour
- UCI World Tour
- UEFA Champions League
- UEFA Conference League
- UEFA Europa League
- UEFA European Championship
- UEFA European Championships Qualifying
- UEFA European U19 Championship
- UEFA European Women's Championship
- UEFA Nations League
- UEFA Super Cup
- UEFA Women's Champions League
- UEFA Women's European Championships Qualifying
- UFC
- UFL
- Ultimate Tennis Showdown
- Under-19 Cricket World Cup
- Under-19s Asia Cup
- United Rugby Championship
- US Masters T10