Croatia senior national team coach Zlatko Dalic is not feeling comfortable as the side get ready for their 2018 FIFA World Cup opening clash against the Super Eagles.

Nigeria will slog it out with Croatia on June 16 in one of Group B’s opening matches.

In a chat with Associated Press Television News (APTN) Dalic, 51, admits the game against the Eagles will be his side’s hardest in the group.

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“The first match against Nigeria will be the key to our group. We are playing against an African team.

“They have a German coach that has changed the style of their game and has introduced a lot of young players in the national team who are young, hungry and ambitious and that’s their advantage. This is going to be the toughest game for us,” Zlatko Dalic stated.

Nigeria intensifies preparation for Russia 2018 with three friendly matches.

The 2013 African champions will play a friendly against DR Congo on Monday before matches against England on June 2 and Czech Republic four days later.

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