"It is not anything horrific, but it bothers me and I hope it will recuperate till the match against England", Vrsaljko said, before adding.
Fox Sports and Telemundo have seen strong ratings for this year's tournament, with Fox building its numbers that so far peaked with a tournament-high 6.32 million tuning in for the Croatia-Russia quarterfinal Saturday on Fox.
More than 200,000 people have signed a petition calling for the Monday after the World Cup final to be made a national bank holiday if England win the tournament.
It will be the third match his has officiated at the World Cup after overseeing Morocco vs Iran and Nigeria vs Argentina.
Englandmanager Gareth Southgate says he is not about to change his team's approach for Wednesday's World Cup semi-final against Croatia, saying he wants the "same again" from his young side.
The Three Lions are just one game away from their first final since 1966, with Croatia standing between them and a showpiece against France, who beat Belgium 1-0 this morning in the first semi-final.
"We can feel the energy and the support from home and it´s a very special feeling and a privilege for us", Southgate said on Tuesday. "We played two games, totalling 240 minutes, and it certainly will be a problem", coach Zlatko Dalic said.
For those unfamiliar (do we really need to explain this?), this basically means that the victor of a game remains the champion until they are beaten by another challenger, who then automatically inherits their title.
"I'm a little bit anxious about Harry Kane". The Three Lions last held the title in 2000 and are second with 73 wins from 144 games. Croatia looked a little vulnerable in the second half against Denmark and then conceded a set-piece against Russian Federation.
Eight years later, in their first World Cup as an independent nation, Croatia lost to hosts and eventual winners France.
One of his biggest criticisms came in 2013 when he sent of Manchester United's Nani during a Champions League quarter-final match against Real Madrid.
There are a number of key battles that may well decide the game; how John Stones copes with the physicality of Mario Mandzukic will be one, as will how Jordan Henderson can cope playing against Luka Modric and Ivan Rakitic.
The players have already bettered expectations, with the whole of England buying into the team and their recent performances. You can sign up for a free 7-day trial right here, and you can then watch any World Cup game live on your computer via the FuboTV website, or on your phone, tablet or streaming device via the FuboTV app.
Pogba dedicates France semi win to rescued Thai boys
France booked their spot in the final after a narrow 1-0 win over Belgium, as defender Samuel Umtiti headed in the vital goal. He was more creative in terms of recovery of the ball, one-on-ones, he performed very well.