Gnabry is convinced they will be able to turn on the style on Saturday.
"It would mean a lot [to progress]," he told Arsenal Player. "Since we won the game against Everton and moved on to the semi-finals, I have been thinking about it a lot. It is a chance for us to win a trophy this year, and we have a pretty good opportunity.
"It is going to be difficult, though. Wigan will do their best to win the game as well to get another shock in against a Premier League team."
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