Manchester United are unhappy with Chelsea as negotiations over a possible transfer of Mason Mount continue.
The United football director John Murtough is understood to have taken a dim view of Chelsea's strategy of communicating United's bids through the club's dedicated correspondents in London.
Chelsea have rejected three offers from United of upfront fees with add-ons worth in the region of £40million, £50m and £55m. Chelsea are holding out for an overall fee of £65m.
