Gylfi Þór Sigurðsson (born 8 September 1989) is an Icelandic professional footballer who plays as an attacking midfielder for Premier League club Everton and the Iceland national team.
Gylfi began his professional career with Reading in the Championship and in 2010, was sold to 1899 Hoffenheim, which was Reading’s biggest sale at the time. He was voted Player of the Season for two consecutive seasons: for Reading in 2009–10 and for Hoffenheim in 2010–11. After a season back in English football with Swansea City, he joined Tottenham Hotspur for a reported £8 million transfer fee. In 2014, he moved back to Swansea as part of an exchange for Ben Davies.
Gylfi made his senior international debut for Iceland in 2010 and has since earned over 70 caps. He represented Iceland at their first major tournament, UEFA Euro 2016, where his country reached the quarter-finals. He also played at his nation’s first ever FIFA World Cup in 2018.
On 16 August 2017, Gylfi signed for fellow Premier league side Everton for a reported £40 million transfer fee (with £5 million in potential add-ons), a club-record deal. On 24 August 2017, he scored his first goal for Everton while making his full debut, with a shot from 50 yards in the UEFA Europa League play-off round second leg against Hajduk Split. On 26 November 2017, he scored his first Premier league goal in an Everton shirt against Southampton, but lost the match 1–4. On 2 December 2017, he went on the scoresheet again in a 2–0 defeat of Huddersfield Town. He ended off the 2017–18 season with 6 goals and 5 assists in 31 appearances.
Gylfi started the 2018–19 season with Everton with an assist to Michael Keane in a friendly match against Valencia, while losing the match 2–3. On 29 September 2018, he scored his first brace with the club, a 3–0 victory against Fulham. On 26 December 2018, he assisted and scored a penalty in a 5–1 victory against Burnley.
Gylfi scored his 100th goal in English football during Everton’s 2nd round EFL cup tie against Salford City on 16 September 2020. On 20 February 2021, he scored a penalty in a 2–0 league win over Liverpool at Anfield, sealing Everton’s first away win over their rivals since September 1999.
Gylfi took part in the 2008 U19 European Championship qualifying, scoring twice in qualification and twice in the elite round, but Iceland lost out to group winners Bulgaria by three points and missed out on the finals. In November 2007, Gylfi made his under-21 debut for Iceland, playing 30 minutes against Germany in a 3–0 loss. He made his first appearance in the 2009 European Under-21 Championship qualifying four days later, coming as an extra-time substitute, and played in the remaining matches. In Iceland’s last match, he scored the opener against Slovakia, but Slovakia’s Miroslav Stoch equalised to make it 1–1. Iceland failed to qualify for the play-offs but made a bright start to the 2011 campaign. He made his campaign debut in October against San Marino, scoring a brace within 16 minutes in a 6–0 thrashing.