Both Manchester giants are chasing Benfica goalkeeper Ederson Moraes.
Record says Manchester United and Manchester City are keen on the Brazil international this summer.
At United, Ederson is seen as a replacement for Real Madrid target David de Gea, while City boss Pep Guardiola has made personally checks on the youngster as concerns have grown over the long-term status of Claudio Bravo.
It's been revealed Ederson's contract carries a €44 million buyout clause, however Benfica are willing to sell for a lesser fee. If a bid of €30 million arrives, Ederson will be allowed to leave.
Interestingly, Benfica president Luiz Felipe Vieira was in London last week for transfer talks with several club representatives.