The Gunners man has struggled to find his best form for the past couple of seasons after returning from an injury layoff in 2012.
He told The Mirror: "There's no point in me saying 'I've got another year to develop'. I'm 22 now. Look at Germany. Mario Gotze won the World Cup for Germany and he's 22, he's my age. It is time to deliver.
"It is an important season for me, a big season, not just for my country but my club as well.
"I've had a good pre-season, the first time in three or four years where I've managed to do every single session. I've stayed away from injury, trained here every day. I'm fit and in the gym. It's a big season for me."