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The 21-year-old has endured a slow start to the Premier League season
Joey Barton believes Dele Alli is being affected by issues off the pitch after putting in another subdued display in the north London derby against Arsenal.
The Tottenham midfielder passed a late fitness test to take his place in Mauricio Pochettino’s starting line-up but failed to make his mark on the game as his side lost 2-0 at the Emirates.