Former Arsenal midfielder Emmanuel Petit has warned his former side over a 'really dangerous' Lens striker ahead of their Champions League match on Wednesday.
Petit highlighted Lens forward Elye Wahi as the leading threat ahead of the group stage match at the Emirates.
The 20-year-old forward starred in the first match between the sides in October, as Lens came from behind to secure a 2-1 home win against Mikel Arteta's side.
Wahi provided an assist for Adrien Thomasson's equaliser on the night, before scoring the winner for the home team.