Manchester United had scouts posted at Napoli in midweek.
The Daily Star says United scouts were in the stands at the Maradona to watch Victor Osimhen against AC Milan.
The Nigerian is the first alternative to Harry Kane for United, with the Tottenham striker their main transfer target.
However, Osimhen's prospects are gaining favour inside United given his youth on Kane.
United are now discussing whether to switch their priority to the Napoli star.
