Manchester United boss David Moyes was in Lisbon yesterday on a scouting mission.
The Daily Mail says he attended Porto's Portugal Cup semi-final with Benfica at the Estadio da Luz.
Highly-rated centre-back Eliaquim Mangala and his Porto team-mate Jackson Martinez were the subject of his attention.
In addition, Moyes has also been alerted to the form of Benfica's on-loan left-back Guilherme Siqueira and was keen to see him in action.
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