didier drogba has 15 goals in 15 games for chelsea against arsenal , averaging one every 78 minutes .
drogba 's first goals against came in the 2005 community shield , scoring both as chelsea beat arsenal , this time securing a 1-0 win in the premier league .
drogba -lrb- right -rrb- beat philippe senderos to head in chelsea 's second goal and secure the league cup .
now back at chelsea , drogba is expected to overcome a knock and return to the emirates on sunday that