Seemingly unaware, Luiz Adriano raced clear of the bemused defence, rounded the goalkeeper and slotted the ball home, sparking a furious reaction from the Nordsjaelland players, and a muted celebration from the visitors.
Luiz Adriano did little to suggest he was aware of his wrongdoing, and the whole episode drew comparisons with an FA Cup clash between Arsenal and Sheffield United in 1999.
Then, newly-signed Nwankwo Kanu was at the centre of a storm after setting up Marc Overmars when the rest of the players had stopped to allow a throw-in to be played sportingly back to the Blades' goalkeeper, Alan Kelly.
The goal proved to be the match-winner, though Arsenal offered to replay the fixture, a game they promptly won 2-1.
In Ukraine, Luiz Adriano went on to bag two more goals as his side ran out 5-2 winners to secure their place in the knockout stages. Willian notched the others.
