Croatia had been the better side and kept the ball more but didn’t give an excellent performance.
It took an own goal from Oghenekaro Etebo to give Croatia the lead
The ball, unfortunately, struck Etebo following a Mandžukić header and rolled into his own net.
Luka Modrić put a second goal in the bottom left corner after sending the keeper diving the other way, which effectively spelt the end for Nigeria.
Kelechi Iheanacho, on a substitute, got clear down the left, but Ahmed Musa’s shot was bravely blocked by Strinic.
Croatia moved to the top of Group D ahead of the showdown against Argentina in Nizhny Novgorod on June 21st.
CROATIA (4-2-3-1): Subasic; Vrsaljko, Vida, Dejan Lovren, Strinic; Rakitic,Modric; Rebic (Kovacic, 78 mins), Kramaric (Brozovic, 60 mins), Perisic; Mandzukic (Pjaca, 85 mins). Booked: Rakitic,Brozovic.
NIGERIA (4-2-3-1): Francis Uzoho; Shehu, Balogun, Ekong, Idowu; Ndidi, Etebo; Moses, Mikel (Simy, 88 mins), Iwobi (Musa, 62 mins); Ighalo (Iheanacho, 73 mins). Booked: Troost-Ekong.
Referee: Sandro Ricci