Former winning machine Hendry lost 6-4 to Neil Robertson, who set up a quarter-final against Stephen Maguire, and was gracious enough to admit he had not deserved to go through.
"When you make loads of unforced errors you don't deserve to win," he said.
"When you feel as uncomfortable as I do out there results aren't going to happen."
World No 10 Robertson finished with a break of 92 to win the first-round clash and Hendry explained his 40th birthday celebrations had been shelved.
"I really wish I had got completely rat-a***d on my birthday now," added the Scot.
"But instead I was in here, practising. Now I am going home and staying away from my TV.
"I really don't give a monkey's who wins now because I am out."