The interest in Porto midfielder Danilo Pereira is growing.
Barcelona are preparing a January bid for Danilo, who is seen as an alternative to Nice midfielder Jean Michael Seri.
However, El Mundo Deportivo says Barca face competition from Manchester City and Arsenal for the 26 year-old.
At Barca, Danilo is viewed as a long-term replacement to Sergio Busquets.
Danilo was a part of the Portugal squad that won Euro 2016 in France last summer.