Mannone insists things must get better when he welcomes his former club Arsenal to the Stadium of Light on Saturday.
"We play Arsenal next week so at the end of the day, we lost 8-0 but we didn't lose eight games 1-0. Let's take it on the chin and go again because we have another 30 games," he said.
"We have to remember how embarrassed we felt and feel embarrassed for ourselves and take some anger from this game into the next one and produce a performance.
"It was a low point for anyone and possibly the biggest embarrassment for the team since I've been here.
"It was a difficult afternoon but we need to react. We have to do it for ourselves, for the club and for our great fans as well that came all that way.
"I take all the responsibility I can take for each goal. I will try to work on it and try to improve. Each one of us should do the same. To try to defend and be in a game properly as a unit. Each one of us knows there were mistakes on the field."
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