Captain Ashley Williams said Wales know they face a tough challenge against Croatia tomorrow night.
"I think they're very good, they've got some top players in their team", the defender warned.
Wales are high on confidence after beating Scotland on Friday, but their last defeat came in October in Croatia.
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Wales have qualified for the Euro 2016 quarter finals after beating Northern Ireland 1-0 in Paris.
A rally has been held in Cardiff following the EU referendum to show support to migrant communities.
It's 0-0 at half time in Paris as Wales face Northern Ireland in the last 16 of Euro 2016.