Martin Keown issued an apology to Ruud van Nistelrooy for his 'shenanigans' at the Battle of Old Trafford in 2003, ahead of Arsenal's game against Leicester on Saturday afternoon.
The former rivals were famously involved in an incident in September 2003, in a game between Man United and Arsenal which was later dubbed the 'Battle of Old Trafford'.
The Gunners were second in the Premier League table, holding an unbeaten record that stretched back to the end of the previous season, while United sat behind them in third.
The affair reached its boiling point when the Red Devils were awarded a last-minute penalty after Keown fouled Diego Forlan.