The match was a doubles match between Federer and Nadal and Tiafoe and Sock and the American came back to win it after dropping the first set. Tiafoe was really great all match long and fans took notice of that. Unfortunately, it's not the kind of publicity he will enjoy as his comments section on Instagram are very volatile.
A fan posted a video scrolling through his comments after the match and it was mostly abusive comments towards Tiafoe for 'what he did'. It's an ugly side of sports and it's never going away. You see it below.