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The sky blue of City and the Red of Middlesbrough - these are the players who connect the two clubs.
The most high profile is Alvaro Negredo, who will line up for Aitor Karanka's side at the Etihad Stadium.
The Beast delighted City fans in the 2013-14 season, plundering 23 goals by January before injury hit his progress.
Home fans will be well aware of the Spaniard's power and prowess in front of goal ahead of the match.
Which four other players have featured for both sides? Take a look at our video to find out.