Manchester United have still not submitted a formal bid for Chelsea midfielder Juan Mata. According to senior figures at United, a bid has yet to be lodged for the Spaniard, although that is expected to change within the next 48 hours. United boss David Moyes hoped to have a deal for Mata tied up by the weekend, with the 25-year-old desperate to move to Old Trafford for a new start. But United's failure to table an official bid for the £37million-rated playmaker is threatening to hold up any potential deal between the two clubs.