Niko Kranjcar says he 'knew right away' that a hamstring injury would force him to miss this summer's World Cup finals.
The Croatia international limped out of the Sky Bet Championship play-off final on Saturday after just 33 minutes.
His loan employers Queens Park Rangers would go on to snatch a dramatic victory over Derby County and book their return to the Premier League, but it was an afternoon to forget for Kranjcar.
Tests have revealed that he has suffered a muscle tear that will keep him sidelined for up to six weeks.
Kranjcar admits he is disappointed to be missing out on a place at football's showpiece event, but insists he will not dwell on the matter and will look to respond positively in 2014/15.
He told Sportske Novosti: "I knew right away that the injury was serious and that I would miss the World Cup.
"I'm really sorry that I will not be able to play in Brazil. The World Cup is something that everybody dreams about, particularly in Brazil.
"But I'm not desperate. I regret it, but I will get over it.
"This is life and things like this can happen. There are ups and downs, there are celebrations and disappointments.
"There is nothing I can do and there are bigger tragedies that this. I guess this was my fate."