The Arsenal right - back created two goals as the Gunners swept the Black Cats aside in the second half to win 3 - 1 .
Hector Bellerin was in splendid form as Arsenal came back from a goal down to beat Sunderland in the FA Cup .
The Arsenal right - back created two goals as the Gunners swept the Sunderland   aside in the second half to win 3 - 1 .
Hector Bellerin was in splendid form as Arsenal came back from a goal down to beat Sunderland in the FA Cup .