Manchester United and Arsenal are both reportedly interested in signing Napoli defender Kalidou Koulibaly.
The 24-year-old joined Napoli from Genk in 2014 and his form over the last couple of seasons has led to suggestions that the likes of Barcelona are closely monitoring developments.
According to II Mattino, Barcelona have a long-standing interest in the Senegal international, but Man United and Arsenal are preparing to go head to head for his signature at the end of the season.
Centre-back Koulibaly came through the youth system at French club Metz.
