"Obviously we were disappointed, for me as an individual as well," the 20-year-old told Arsenal Player.
"I think they were a bit sharper than us but the difficult thing was they scored first.
"We wanted to score as quickly as possible in the second half but after 65 minutes they scored so we were a bit thrown after that.
"I would say it [my performance] was not good enough. I'm not satisfied on my individual things but we have a lot of games to go so I want to prepare for that. Let's focus on Liverpool on Saturday."
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