"I have to say a big thanks to the boss for sticking by me," said Foster. "Last Sunday was great for the team but personally, it was an absolute disaster.
"I was gutted afterwards. I was the only one in the changing room with an upside down smile on his face."
The torment continued long into the week as professional and amateur analysts had their say.
Foster could have driven himself mad by pouring over every damning word. Instead, he chose to ignore it all.
"I pretty much buried my head in the sand," he said. "I didn't really want to watch the television and there was no way I was reading the papers the next day."
Not that Foster could escape scrutiny. But the assessments that mattered were kept within United's Carrington training complex as goalkeeping coach Eric Steele delivered his withering verdict.
"When we got into training I had to face up to it," he said. "I had to look at the replays, analyse them and learn from them.
"The goalkeeping coach has been on at me all week and was really hard on me. But I needed that and I like to think I have learnt from it.
"You are going to have those days as a goalkeeper sometimes and you have to keep them to a minimum."