Shay Given is determined to prove Roberto Mancini wrong and force his way back into Manchester City's starting XI.
Given is yet to play for his club this season, having lost his place to England's Joe Hart, and a loan move to potential suitors such as Celtic and Fulham failed to materialise.
"For me, now the window has closed, that's gone," Given said. "I have got to put my head down and work hard and try to get back in the team.
"I don't feel I have done a lot wrong since I have been at the club, so I suppose it's about proving the manager wrong and trying to work hard to get back in the team and if I get a chance, taking that and seeing how it goes.
"It is frustrating, but this is life at a big club which can buy as many players as it wants. You have got to be patient. But I am delighted to have played tonight and to keep a clean sheet was a bonus as well."
Given made his first appearance of the season as Republic of Ireland beat Armenia 1-0 in their opening Euro 2012 qualifier on Friday. The 34-year-old said the team were happy with their display, and are now looking towards their clash with Andorra on Tuesday.
"We are really pleased with the way we have started," he said. "Hopefully we can get three points against Andorra on Tuesday night and that will set us up for next month, which is a tough month."
Given was pleased to come away from Armenia with three points, especially with tougher tests against Russia and Slovakia to come in October.
"We said before the game that if we have got ambitions to win the group, we had to come here and get three points, and that's not an easy thing to do. People say, 'Armenia, you should beat them no problem', but I think teams will come here and find it difficult. A clean sheet and three points, we are happy with that."