Manchester City boss Pep Guardiola took in Mansfield vs Cardiff on Tuesday evening as the Spaniard visited Field Mill on a scouting mission.
The former Barcelona manager donned a Peaky Blinders-style flat cap as he posed for a picture alongside Mansfield CEO Carolyn Radford.
She shared the snap on Twitter, posting: "We have a legend in the house!!"
Mansfield and Cardiff were battling to take on Pep's Man City side in the fourth round, and it was the Bluebirds that navigated their way through.
Goals from Ecuele Manga and Anthony Pilkington plus a Junior Hoilett brace were enough to seal a 4-1 win for Neil Warnock's side.
Guardiola and City are bidding for a quadruple this term despite losing their unbeaten Premier League record at Liverpool on Sunday.
They sit 12 points clear at the top of the Premier League, are in the last 16 of the Champions League and have a 2-1 aggregate lead against Bristol City in the semi-final of the Carabao Cup as well as their FA Cup exploits.
City host Newcastle in Saturday's late kick-off in the Premier League.