Just to add my opinion. Your starting SG only played 16 minutes and had 5 fouls. That means that your backup SG was forced to defend their best offensive player (their SG) for an extended period of time. Not sure how much of a defensive drop off that is, if any, just thought I'd mention it. I believe it was a combination of home court advantage, more effort and a little bit of luck on his end.
Murray/Harris/MPJ/Grant/Jokic - 2020 NBA Champs