Reports are out claiming that Arsenal are again active in the Portuguese transfer market this month.
Gunners boss Arsene Wenger continues to shop for a young ball-winning midfielder.
Long-term target William Carvalho, of Sporting CP, has been joined by Porto midfielder Danilo Pereira, says A Bola.
Arsenal scouts have been tracking Danilo, 24, for some months.
Despite the arrival of Mohamed Elneny in January, Wenger needs to find a new midfield signing with Mikel Arteta and Mathieu Flamini leaving Arsenal at the end of this season.