The Premier League returns this weekend and the 188th Manchester derby is undoubtedly the highlight of the weekend's offerings.
It pits together champions City against a resurgent United, who are riding high after four consecutive league wins. The visitors will be eyeing revenge after a sobering 4-1 loss on their last visit to the Etihad back in March.
Whilst the level of rivalry between the two teams cannot be questioned, there are a select band of players who have dared to cross the Manchester divide down the years. Here we cast our eyes over some of the more prominent names to have represented both City and United.
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Carlos Tevez
Arguably the poster boy for this limited pool of players, Tevez caused more than a stir when he opted to move across Manchester in 2009.
He swapped Old Trafford for the Etihad and the 'Welcome to Manchester' billboard that City put up in Deansgate is an image that went down in English football folklore.
After winning the Premier League in 2012, Tevez left for Juventus after four years on the blue half of Manchester.
Brian Kidd
The only man to play for both clubs and also serve on their coaching staff, Kidd scored in the 1968 European Cup final for United.
Spent seven years at United and after a spell at Arsenal he returned north to join City, where he stayed between 1976 and 1979.
After moving into coaching he spent a decade at Old Trafford, most of that time as Sir Alex Ferguson's assistant before leaving in 1998. He then completed the full set by moving to City's coaching staff in 2009, where he would spend 12 successful years as a key part of the backroom staff.
Peter Schmeichel
Goalkeeper Schmeichel spent eight trophy-laden years at United where he enhanced his reputation as one of the world's best.
A brief spell in Portugal with Sporting followed before he was enticed back to the Premier League with Aston Villa. He then sprang a shock by joining City on a free transfer and his sole season at the club saw him maintain his unbeaten Manchester derby record by playing his part in a home win and a draw at Old Trafford. He retired at the end of that 2002-03 season.
Owen Hargreaves
One that many might have forgotten about, given his brief appearances for City. Hargreaves achieved plenty of success in Germany with Bayern Munich and United were expecting big things when they acquired him in 2007. But after making 23 league outings in his first season, he would then be ravaged by injuries. They restricted him to a paltry five games in three seasons.
Unsurprisingly, his contract wasn't renewed but City took a chance on him in the summer of 2011. It failed to pay off though and he was there just one season, making four appearances before retiring.
Denis Law
Law is revered at Old Trafford where a statue of him proudly stands. But his spell at United is sandwiched between two stints at their bitter rivals.
Arguably the most famous flashpoint of his City days was a backheeled goal in a win over United, who were already relegated to the Second Division back in the 1973-74 season.
But long before then he had already written himself into United history thanks to 237 goals in 404 games.
Full list of players to have played a first team game for both Manchester United and Manchester City (post-war): Peter Barnes, Peter Beardsley, Andy Cole, Terry Cooke, Wyn Davies, John Gidman, Owen Hargreaves, Andrei Kanchelskis, Brian Kidd, Denis Law, Sammy McIlroy, Mark Robins, Peter Schmeichel, Carlos Tevez.
* Players to have been on the books of both but didn't feature at first team level for both: Tony Coton, Shaun Goater, Jon Macken, Jadon Sancho.
