RF is in a difficult position -- he has to not only play a great player in RN; he also has to mentally overcome the FO losses, play for his claim as GOAT, and endure the media scrutiny of his game. With that said, I think RF has outplayed RN today and in earlier FO matchups. Against RN, RF needs a lead to regain his confidence.
Federer is so calm under pressure. He just kicks it up a notch when he needs it. Great shot after great shot by both guys in the tiebreak.