I play a solid 4.5 player and I ALWAYS get up 4-1 then proceed to lose the set. He tells me when I get to that same score I turn into a different player. I'm not sure why with him. Our skills are very similar and he's a good guy so there's no animosity while playing. There's no shame in losing to him but also I hate losing like that.
My worst losses though are to people who get under my skin with gamesmanship or outright cheating. Outwardly you wouldn't know I'm fuming but those are the losses that eat at me. I want to beat these players so badly to show I'm immune to their antics but I would say I lose those matches 70% of the time.
Those really sting.
(4) Volkl PB 10 Mids
Babolat Tonic+ 16/Babolat RPM Team 17 @ 51 lbs