Croatia have confirmed the sacking of Ante Cacic and replaced him with Zlatko Dalic after the 1-1 draw with Finland.
The draw means Croatia are two points behind Iceland, who are top of the group and are level on points with Ukraine, but have a better goal difference.
Modric did not support Cacic after the game , as Croatia are in danger of losing their playoff spot.
“We had four coaches to pick from and Dalic was unanimous decision,” Suker told the press on Saturday.
“Throughout history, Croatia always had domestic coaches and we were guided by that, we didn’t want foreign one. We have 17 points, still can reach the play-offs. We spoke to the players, they are professionals, they know coach depends on results.
“Twenty years ago (ahead of 1998 World Cup, where Croatia came third) we were in similar situation at the end of qualifiers.
“Josip Simunic and Ante Mise left the national team along with Cacic, so Dalic will only have goalkeeping coach Marijan Mrmic with him on the bench in Kiev.
“It was turbulent night, we figured out the team was missing something – we won four of a possible 12 points in last four matches.
“Ukraine are favourites on Monday because they play at home, we don’t score goals and that is the problem for the coach and players. This was shock-therapy and we hope we will have some good luck in Ukraine and win a play-off place.”