"In the second half it was a different team because they realised at half-time that we had to do much more".
They will now face Argentina on Tuesday, hoping to book a place in the knockout rounds.
"Musa now added to it with his speed, and this changed the game for us".
Iceland's goalkeeper Hannes Halldorsson (R) and Iceland's forward Alfred Finnbogason (L) give a press conference at Olimp stadium in Kabardinka on June 20, 2018, during the Russian Federation 2018 World Cup football tournament.
"He is getting better every day".
Brazil vs Costa Rica
Meanwhile Nigeria will be looking for a win as they lost their opener against Croatia and need the three points. Serbia is on dark horse status after their impressive win against Costa Rica in the first group game.
"I think they have played well".
Nigeria will be looking to get a win in their second Group D game against Iceland, but Super Eagles will know that they will have a tough test against debutants Iceland who showed plenty of fighting spirit in their 1-1 draw with Argentina.
A pastor in Nigeria has urged his followers to pay him more than $2,000 (about Sh200,000) to unleash a squadron of "prayer warriors" to help the country's footballers secure a World Cup win. We want to improve, we want to learn.
"We are ready for this match and we are united, we are working like a team and living like a family". However, after such a disciplined performance they will fancy getting a positive result against their West African opponents.
"We had 47 percent possession of the ball, we had 14 shots on the goal, they only had 12".
Croatia: With two wins - over Nigeria and Argentina - they bagged six easy points to qualify for the round of 16 for the first time since 1998, when the Balkans had finished third in the tournament in France.