Kevin De Bruyne compared Rasmus Hojlund to his former Manchester City team-mate Erling Haaland as the Dane was one of several ex-Man United players to star in the Champions League.
The Red Devils missed out on the competition after losing last season's Europa League final to Tottenham, but several of their former players were in action on Wednesday.
Hojlund, who was dropped from Ruben Amorim's squad at the start of the season, continued his impressive start to life with Napoli.
The forward was named as the player of the match after netting twice for the reigning Italian champions in their 2-1 win over Sporting Lisbon.