Emery’s Arsenal have struggled on the road since the start of the calendar year and have won just three of their last nine away games in all competitions. (Photo: File)

Unai Emery believes Arsenal have a “50-50 chance” of reaching the Europa League semi-finals despite taking a 2-0 lead into Thursday’s second leg against Napoli.

Arsenal dominated the first leg at the Emirates Stadium last week as an Aaron Ramsey finish and a Kalidou Koulibaly own goal secured the win inside 25 minutes.

However, Emery’s Arsenal have struggled on the road since the start of the calendar year and have won just three of their last nine away games in all competitions.