Arsenal manager Mikel Arteta believes striker Pierre-Emerick Aubameyang was 'unlucky' not to have finished the 1-1 Europa League draw at Benfica with 'two or three goals' as in 'normal circumstances' he would have put the chances he had away. Aubameyang will get another chance to find the back of the net against the Portuguese giants when the teams meet next week for the second leg of this Europa last 32 tie in north London.