Not after the game finishes.
Just got verbally harassed in a gold-platinum ranked 1v1 game by a player with 8000+ ranked games experience, 1300+ account level, 1400+ elo Conqueror 1 in Season 1, and dropped to only 800-1000 elo in all Seasons 2 to 10. I’m a newbie, my account level is just 60. The abusive chats are very annoying. But I don’t know where to mute him during the game. I only know that you can do it after-game at the scoreboard.
Reported him as well, but not counting too much on that.