Man United will also look to make a big money offer for highly rated FC Porto centre-back Eliaquim Mangala with the 22 year old looking likely to become the latest talent to be sold on for a hefty profit by the Estadio Dragao side.
The French international is seen as a strong defensive option with a bright future and Moyes appears ready to freshen things up at the back following the less than glorious run of displays by veteran Rio Ferdinand and injury prone Serbian Nemanja Vidic.
Mangala is a much coveted commodity at present with a number of sides pursuing the former Standard Liege man following a rock solid season at the Estadio Dragao last term which saw the 22 year old help the club to a domestic title having conceded just 14 goals in 30 Primeira Liga fixtures.