Manchester United have agreed a stunning deal to sign Sporting Lisbon midfielder William Carvalho. David Moyes will overhaul his under-performing squad in the summer and Carvalho will be the first of a host of new arrivals at Old Trafford. talkSPORT understands United have already agreed a fee of around £35million with Sporting Lisbon and finalised terms with the midfielder on a five-year contract, although the deal will not be made official until the transfer window opens.