Nigeria coach Gerhot Rohr was full of praise for his side, who are the youngest at this World Cup, especially the way they came out firing in the second half after Iceland put them under the pump in the first 45 minutes.
“What I like in my young team is humility, solidarity and fighting spirit. I thought before this World Cup we were here to learn,” said the German.
“I think this team will be ready in 2022 and this World Cup is coming early, but we have a good chance to win against Argentina.”
Musa, who came into the starting line-up in place of Alex Iwobi, announced himself in magnificent style with two of the goals of the tournament.
Musa’s sweetly struck half-volley fired Nigeria into the lead just after half-time before he added a second with 15 minutes to go to make the game safe.
Iceland got a lifeline in the 82nd minute with a VAR-awarded penalty but dead-ball specialist Gylfi Sigurdsson blazed over the bar.
With Croatia heading the group on six points Nigeria knew a second defeat would mean elimination but now qualification is in their own hands.
Iceland started brightest but Nigeria, with captain John Obi Mikel sitting deeper in midfield than the defeat against Croatia, slowly worked their way into the game as Victor Moses posed a constant threat on the right flank.
Rohr brought on wing-back Tyronne Ebuehi for Bryan Idowu at the start of the second half and Nigeria came out full of running.