W T L pts goal-difference Croatia 2-0-0 6 +5 Nigeria 1-0-1 3 0 Argentina 0-1-1 1 -2 Iceland 0-1-1 1 -3
The next two matches are Nigeria vs Argentina and Iceland vs Croatia
In my mind, Croatia has very little to gain from winning their match. The only team that can tie them in points is Nigeria, but in their next match, Argentina will be playing to win (since they still have a chance to take second in the group), so Nigeria probably won't get the goals to take first in the group on a tie-break based on goal difference.
In my mind, the best strategy for Croatia here is to play to avoid injuries and cards so that all of the players start the knockout phase fresh, even if that means benching the key starters and losing the match.
Is there anything that prevents Croatia from using this strategy, or is this common in the World Cup?