Arsenal manager Arsene Wenger has claimed that the next three months will determine whether Alex Oxlade-Chamberlain is ready for an England call-up to Euro 2012.
The 18-year-old winger stood out during his full Premier League debut in last Sunday's 2-1 defeat at home to Manchester United.
"The next three months will tell you [if he is ready]," Wenger told reporters. "We live in a world of immediacy.
"I would not have expected him to be so mature in September because he still looked like a boy. Now suddenly he looks like he can take pressure and that he has the personality to produce under pressure.
"But he has only really played one game at the top so let's see how well he does. I do not want to rule it out because it should not be that you cannot play because you are 18 years old. But I do not want to say after one game that he absolutely has to go [to Euro 2012]."
Oxlade-Chamberlain moved to the Emirates Stadium from Southampton in August 2011 for around £12m.