The Angolan league's top goal scorer Manucho is having a trial at Manchester United, according to the state-run Angop news agency.
The Angolan international striker, who has scored twice in 10 appearances for his country, left for the English champions on Tuesday.
He was top goalscorer in the last two seasons of the GiraBola, finishing with 16 goals for Petro Luanda in 2006 and 15 goals this year.
The Angolan season ended last month.
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