He was leading but was visually nervous. Same thing for FZD. Both are nervous af. I would've taken a TO at 6:4 or 6:5 when Harimoto still had the lead.
Same script for game 4. Leading early on and then blowing it. TO at 6:7 by Harimoto. Too late in my opinion.
FZD played well in crucial points and that made the difference. I think overall strategy was to keep playing short in Harimoto's FH and change of pace with spinny balls. The message is clear - You can not defeat Harimoto with pace but with lack of it.