Juan Mata has reportedly grown frustrated with Chelsea for delaying his impending transfer to Manchester United.
The Spaniard was expected to have a medical in the North-West city last night, but the midfielder is believed to have been kept waiting by the West London outfit.
According to The Telegraph, Mata became frustrated with the club when they decided against sanctioning his move until they had agreed a deal to sign Basel winger Mohamed Salah.
Despite United preparing for Mata's arrival via helicopter at their Carrington training base yesterday, it is understood that senior figures are unconcerned by the delay.
Reports have claimed that the midfielder, who has failed to secure a first-team place under Jose Mourinho this season, has agreed a four-and-a-half-year contract worth £150,000 per week.
It is believed that the transfer will be completed in the next 48 hours.
