The Argentina international headed to The Woodley Arms to film a 10-minute frame as part of an advertising campaign for sponsors Puma.
Pub manager Jamie Taylor, who supports City rivals Manchester United, told the Manchester Evening News: "You couldn't say no, could you? He's a great player and I was as giddy as anyone when he came through the door.
"A lot of our regulars are City fans so it's been a great afternoon for them and something I'm sure we'll be having a bit of banter about for a long time. He was pretty handy pool player as well. We've got a pool league down here and if he fancies a regular game he's welcome any time."
A number of fans within the 100-strong crowd received autographs and photos from the frontman during his breaks from filming.