UEFA Nations League: Romelu Lukaku nets twice as Belgium begin campaign with comfortable win over Iceland
Eden Hazard converted a penalty after a foul on Lukaku, with the Manchester United striker netting a quick-fire second before adding a third in the closing stages.
Gudmundsson was forced off after an hour against Argentina but there was better news on Swansea City's Gylfi Sigurdsson who had faced a race against time to be fit for the tournament.
Iceland's back-up keeper Runar Alex Runarsson has signed with Ligue 1 club Dijon, after two solid seasons with FC Nordsjælland.
FIFA World Cup 2018: Iceland's Hannes Halldorsson reveals he worked on psyching out Lionel Messi after penalty save
Iceland goalkeeper Hannes Halldorsson revealed on Saturday how he worked on psyching out Argentine superstar Lionel Messi to make a penalty save that sealed a 1-1 draw with the footballing superpower.
He boasts a Germanic name, Portuguese roots and learned his football in Spain, but France are counting on Antoine Griezmann's loyalty to take them to a Euro 2016 triumph.
Gylfi Sigurdsson has promised Iceland will not be content to bask in the glory of their Euro 2016 heroics having had a taste of the highs and lows of tournament football.
Iceland will aim to continue their dream run at Euro 2016 as they meet hosts France in the quarterfinal. Here are the top five players from each team to watch out for.
Albania, Iceland and Croatia players make it to the Group stage XI of Euro 2016 after household names fail to impress.
Iceland's heroic goalkeeper Hannes Halldorsson was on cloud nine after stopping Cristiano Ronaldo making history as the minnows held Portugal to a 1-1 draw on their Euro 2016 debut.
Portugal overran Iceland for most of the game, attacked the goal with Mediterranean verve. But for man-of-the-match, goalkeeper Hannes Halldorsson, the scoreline might have been different