Somdev was a break down in the second set and was 1-*4 down in the third set. He won with his competitiveness and awesome returning and passing shots when Zverev was serving and volleying. Got to every ball, hit a few great lobs, whenever there were rallies he was the more aggressive player, and Somdev wore Zverev down.
His game isn't all the way back but his fight has never left. Former UVA grad playing a de-facto home event, so you know the motivation is high to do damage here. Great win for him.