Skipper's message following defeat in London.
John O'Shea admits the defeat at Arsenal has been a “wake-up call” for his side.
Sunderland suffered a 4-1 reverse at the Emirates Stadium in their final league game before the Capital One Cup final at Wembley.
Olivier Giroud broke through early on and then added a second goal before Tomas Rosicky made it 3-0 just before the break.
It's a wake-up call for us, both in the league and ahead of next weekend
- John O'Shea
Laurent Koscielny then added a close-range header before Emanuele Giaccherini scored a fine consolation for the visitors late on.
And O'Shea is keen to learn the lessons from an afternoon which he says was in sharp contrast to the side's other performances away from home of late.
“You're fully aware coming to the Emirates that it can be a tough day, but we helped Arsenal out a little bit with the way we underperformed in the first half,” O'Shea told SAFSee.
“It was very disappointing because of how we'd been performing away from home, going unbeaten for a few months.
“It's frustrating but also a good wake-up call to realise the standards we've set for ourselves.”
Sunderland were much improved in the second half, with Gus Poyet making a pair of substitutions at the break.
But there was no way back for the Black Cats, who suffered their first defeat in seven away games.
“First and foremost you look at yourself and how you can do better, then the team as a unit,” O'Shea added.
“The second half was a little bit better – we started well but then conceded from a corner which knocked the stuffing out of us.
“We responded again; Emanuele scored a good goal and we could have had a couple of others with some good counter-attacks.
“It's a wake-up call for us, both in the league and ahead of next weekend.”
He added: "We have to make sure we look at ourselves individually and collectively, dust ourselves down and go again."
Watch the full interview with John on SAFSee above.