Monica Seles is Attacked During a Match (1993)
Most of the events on this list stand out for being frustrating or disappointing, but tennis star Monica Seles faced an experience that was outright terrifying when deranged spectator Gunter Parche jumped from the stands to stab her in the back in the middle of 1993 match in Hamburg, Germany. The attack kept Seles from competing for the next two years at a time when she appeared to be in her prime. We’ll never know what she could have achieved with an uninterrupted career, but we can be thankful that she did make a full recovery.