Barcelona sporting director Robert Fernandez and scout Urbano Ortega watched Philippe Coutinho during Liverpool's 4-1 defeat to Tottenham Hotspur on Sunday.
Sport reported the club "took another step towards signing Coutinho" and shared a photo of the Barca pair at Gatwick airport:
According to Marca's Xavi Hernandez, the Brazilian is expected to be at the centre of any recruitment efforts Barcelona make in January, and manager Ernesto Valverde said the club "are open to strengthening the team in the winter market."
However, Hernandez added that because of the team's excellent start to the season, "their thinking at the moment is that there isn't a need to move heaven and earth to sign him in the winter.