He scored on his debut on 8 September in a 5–1 Ligue 1 win at Metz, in which Benoît Assou-Ekotto was sent off for fouling him.
Dia mencetak gol pada debutnya pada tanggal 8 September di kemenangan 5-1 Ligue 1 atas Metz, di mana Benoît Assou-Ekotto mendapatkan kartu merah karena menjatuhkannya.