Speaking to BBC Radio 5 Live, the Arsenal star said, "I've worked hard to be back here. This team knows how to fight, we've proved that over and over. But now we need to get back to our top level, there is a new top-level and we need to be able to find and get to it. The campaign has tested us but we have come through it. We were not able to top the group, which we are not happy about, but we qualified and that gives us a year to literally squeeze everything we can out of ourselves.
"High stakes games make players but you can't always work on what you need to. You have to play the game in front of you to get what you need. It is good preparation for us to have the friendlies in place, we know what is ahead of us next summer. We are reigning champions so we know we should qualify but we take pride in the fact that we have."