The former Red Devils striker returned to Merseyside in 2010 as Atletico Madrid faced Liverpool in the second leg of their Europa League semi-final.
Forlan scored an extra-time winner to send the Reds out of the competition, with Rafael Benitez leaving the 18-time English champions months later.
However, the Uruguay international revealed that he was flattered to receive an ovation from the Liverpool fans despite the ex-United striker’s winner.
“I also went back to Anfield with Atletico Madrid and scored the goal which knocked them out of the 2010 Europa League and put us into the final,” Forlan wrote in his National column.
“After the game, the Liverpool fans in the main stand applauded me. That was a big gesture as I’d not only played for United, but I’d just ended their European dream in the semi-final.”
Forlan memorably scored twice in a 2-1 win against Liverpool at Anfield in December 2002.
The Uruguayan’s 65th-minute opener came after an abysmal mistake by Jerzy Dudek in the Liverpool goal.
His second came three minutes before full-time after the South American drove a powerful shot past the Pole’s near post to seal three points and a memorable win for Sir Alex Ferguson’s men.
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