This week marks 20 years since the most unique tie in Emirates FA Cup history.
Sheffield United were the visitors for a fifth-round tie against Arsene Wenger's side, who were looking to defend the trophy they had won the previous year.
A controversial winner scored by Marc Overmars led to Wenger offering to play the game again 10 days later. The decision was ratified by the Football Association, and we would win the rematch 2-1.
Our club photographer was at Highbury for both games, too. Here are some of his best shots: