Arnar Þór Viðarsson is an Icelandic football coach and a former player, his playing position was midfielder. He last played for Belgian Pro League side Cercle Brugge, where he was also employed as head coach. He was the head coach of Iceland men's national team from 2020 to 2023.

Cercle Brugge Koninklijke Sportvereniging is a Belgian professional football club based in Bruges. Cercle have played in the Belgian Pro League since the 2003–04 season, having previously spent several years in the Belgian Second Division following relegation in 1997. Their matricule number is 12. The club plays home games at the Jan Breydel Stadium, which they share with fierce rivals Club Brugge. Cercle Brugge won their first national title in 1911, and won two more titles before the Second World War. The side also won the Belgian Cup in 1927 and in 1985, and have represented Belgium in European tournaments on several occasions.