3)Gylfi Sigurðsson

Gylfi Sigurdsson is the most experienced midfielder in the entire squad. He has been playing in the Premier League for about 5 years now. He is currently playing for Everton. He has made 55 appearances for the Iceland national team and scored 18 goals.
He played for Reading in the English Championship. He scored 18 goals in his 42 appearances for them. In 2012, Gylfi was signed by Tottenham Hotspur at a fee of $8.8 million. He made 58 appearances for them and scored 8 goals. He returned back to Swansea City in 2014. He scored 27 goals for them in his 106 appearances. Later, he joined Everton for £ 40 million. In the current season, Gylfi has played 33 matches for Everton and has managed to score 6 goals.
Iceland would be dependent upon Gylfi's experience in the tournament. He would be up to exhibit his experience in the world's biggest soccer league.