Barcelona are reportedly interested in signing Porto midfielder Danilo Pereira at the end of the season.
The 26-year-old started his professional career with Parma, but has been at Porto since 2015.
The midfielder is also a 26-time Portugal international, and has previously been linked with the likes of Arsenal.
According to El Mundo Deportivo, Barcelona sporting director Robert Fernandez made a personal check on Danilo during Portugal's 2-0 win over Andorra at the weekend.
The report claims that Danilo is viewed as a long-term replacement for Sergio Busquets, and Barcelona are seriously considering a move for the powerful midfielder at the end of the 2017-18 campaign.
Danilo was a part of the Portugal squad that won Euro 2016 in France last summer.