Barcelona scouts made AC Milan's clash with Genoa.
The Barca reps saw Milan defeat Genoa 2-1 on Sunday.
Sky Italia says the prime focus of their attention was Milan goalkeeper Gianluigi Donnarumma.
The 16 year-old has established himself as Milan's No1 this season.
Along with Barca, Chelsea are also interested in Donnarumma, which was confirmed by former Milan teammate Marco Amelia.