That's a performance Wenger is also hoping Wilshere will be able to replicate, and said he shouldn't change his playing style despite the number of serious injuries he has suffered since then.
So, Wilshere made a decision to stay at Arsenal this summer, but is already angling for a move two weeks after the transfer window closed?
Arsenal have dropped out of the Champions League for the first time in 20 years, but Arsene Wenger is still adamant that he would rather that the club return to the Top Four to guarantee Champions League football next season, rather than win the Europa League, like Manchester United did last season.
"But you play similarly".
Europa League glory would guarantee a Champions League place next season - a route taken by Jose Mourinho's Manchester United a year ago - but Wenger believes the best way to qualify is via the English Premier League.
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"His game, you have certainly seen the video of him when we played against Barcelona, his game is about that", Wenger said, highlighting a particularly impressive display against the Catalan giants in 2011. "We wanted him on loan and were close to a deal but the move stalled at the last moment". "And that is coming back in training as well".
"There was always a huge pressure on him to come back as quickly as possible and to expect a lot".
His recent return to action in the under-23s ended unhappily as he was sent off for a brawl with a young opponent. "Some just come back like nothing happened to them, so are traumatised for their whole life".
"The disadvantage is of course that he was out of the game for a long time but there are advantages as well". "I had a conversation with him, but I didn't have to raise his spirits at all".