Years ago I was friend with a guy who played tennis at international levels (say top 1000 players). He regularly received death treats on social networks from people Gambling on him to win/lose (and the opposite happened)
Still happens at all levels of professional sport. Even the top women get messages on their IG accounts all the time by degenerate gamblers pissed off after a loss.
Getting death threats from aggrieved gamblers, MLB players starting to fear for their safety
https://www.usatoday.com/story/sports/mlb/columnist/bob-nigh...