According to the press service, Croatia team members demonstrated unapproved beverage products during their round of 16 match against Denmark in Nizhny Novgorod on Sunday.

The Disciplinary Committee also issued a warning to HNS for violating FIFA outfitting rules as goalkeeper Danijel Subasic showed a personal photo after Croatia's 3-2 win on penalties over Denmark.

For years, Subasic has worn a shirt under his jersey bearing the picture of his former team-mate Hrvoje Custic who died tragically when he crashed into a concrete wall during a game. The image appears under the word 'Forever'.

It's not the first time Croatia has copped a fine at this World Cup. They were also slugged around AUS$17,700 because of fans' behaviour during the Group D clash with Argentina, when fights broke out it the crowd and items were thrown onto the pitch.

The 2018 FIFA World Cup kicked off on June 14 and will continue until July 15, with the matches being played in 11 cities across Russia.