For a visiting manager to guide his side to victory at Old Trafford once is impressive. To do it twice is historic. Managing it three times - with three different clubs, no less - would set a new benchmark in modern football.
That is what Rafa Benitez could achieve on Saturday when he takes his Newcastle United side to Manchester United.
It would be a very sweet achievement for Benitez - not least because of his long-running rivalry with current Red Devils boss Jose Mourinho.
Mourinho and Benitez will surely be aware that if Newcastle earn a surprise win, Rafa would become the first Premier League manager in history to win at Old Trafford with three clubs.