Good deal!! So you closed out this set after you got to 5-1. What did you focus on now compared with what you were thinking about further back in those other sets? Was it a case of getting away from merely trying not to lose after you got the lead?
I came to a new fundamental understanding of a bundle of different things several years back after reading "Mental Tennis" by Vic Braden. I recommend this book to tennis pals all the time and a few of them have enjoyed it, too. He was a great story teller, but Braden was a licensed psychologist on top of also being a long-time tennis guru. His book offers invaluable insight that can probably be useful for absolutely everybody on these boards. So I guess I'm recommending it.
I coach high school teams and something we get talking about all the time is how we decide to perceive what's happening through the course of a match. Whenever one of the kids blows a lead and still manages to win that set or maybe the match, they always get down on themselves about it and think that they almost choked the set (or match) away. I like to offer that they're making a decision there in terms of how to look at it. Instead of dumping on themselves, they could also think that it was a good thing that they got the early lead before their opponents went on a bit of a comeback run.
The root of this issue is about the expectations that we take with us onto the courts - this is a significant topic addressed by Braden in his book. As soon as we think that something "should" happen out there, we're in a trap. If all goes as planned at the outset, we can get complacent and not play with the sharpness we might when the score is even - or when we're behind as offered by Brad Gilbert in "Winning Ugly". If things don't go as planned, we might freak out because what should be happening isn't actually happening.
So with Braden's wisdom in mind, I'm curious about how your focus evolved to work more in your favor. This sort of head management is actually a big deal for players striving to break through to a higher level.