It was a very tough night for Arsenal as their hope in the Europa league almost comes to an end during their encounter with Benfica, Benfica is already leading Arsenal with two goals by aggregate.
Arsenal manager Mikel Arteta is quickly aware of the danger ahead of the results that his team is gradually stepping out of this season's Uefa Europa league if they lost the match against Benfica, he quickly looking for who can help him among his bench players, luckily enough for him he picked William.
It is no secret that the Brazilian has had his struggle since moving from Chelsea in the summer, many fans on social media were not happy with the decision to bring him on over anyone else.
But just four minutes later the manager's faith in the 32 years old had been justified as he did a vital assist for Kieran Tierney equalizer on the night.
This equalizes goal motivated the team more, and P. Aubameyang now sealed it with the winning goal in 87 minutes, after that the Arsenal manager was keen to stress the impact he felt the Brazilian had made on the side and credited him immensely for keeping the team in the competition.