A summer transfer tussle over a £52.5 million defender could be the key to success in Manchester next season.
According to Sky Sports, both United and City are interested in signing Red Leipzig centre-half Dayot Upamecano.
The 21-year-old has been strongly tipped to move on this summer, with Bayern Munich amongst the other clubs believed to be tracking his progress.
However, with United and City desperately needing to strengthen their respective defences, a move to the Premier League is an interesting proposition.
United need to find a regular partner for Harry Maguire, while City are in the market to buy someone to link-up with Aymeric Laporte.