The FA Cup produced another boisterous, thrilling, ultimately quite frantic fourth round tie at the Amex Stadium where Arsenal managed to look both supremely well-tuned in attack and familiarly fragile at the back in a thrilling 3-2 defeat of Brighton and Hove Albion. Twice Brighton surged back from two goals down to push the Cup holders all the way in a match that looked at the end of the first half like confirmation of Mesut Özil and Theo Walcott’s return to starting health; but which by the end had provided further evidence of the ability of Football League clubs to compete in this competition with the elite.