Looking at Iceland vs Croatia head to head the two nations have faced each other six times previously, all coming in World Cup qualification.
Croatia won four and drew one of the first five but Hordur Magnusson's last-minute goal saw Iceland win 1-0 last summer.
Iceland must on Tuesday beat Croatia, and hope Argentina do not beat Nigeria, to reach the knockout stages.
Here is a result of the poll of the outcome of this match.
Iceland win 5/2
Croatia win 5/4
*Odds accurate at time of writing! 19/06/2018 09:50 a.m