Liverpool manager Jurgen Klopp says he almost called a radio phone-in after hearing Gabby Agbonlahor's "unbelievable" comments on Manchester United's 4-0 defeat at Brentford.
United host Liverpool at Old Trafford on Monday in the Premier League.
"What he said about United, I was close to calling in and telling him, 'you have forgotten completely that you have been a player'," Klopp said.
Agbonlahor, 35, was in the Aston Villa side that lost 6-0 at home to Liverpool in February 2016, with Villa ultimately relegated to the Championship that season.
Klopp has since won the Premier League and Champions League with Liverpool, plus both domestic cups last season, and has labelled his team "mentality monsters".