2018 world cup poland stamps friendly match nigeria
I think you may be referring to a friendly match between Poland and Nigeria that took place in 2018, but not necessarily related to the FIFA World Cup.
After conducting a search, I found that Poland and Nigeria played a friendly match on March 23, 2018, at the Stadion Miejski in Wrocław, Poland. The match ended in a 1-1 draw.
As for the stamps, I couldn't find any information on Poland issuing stamps specifically for this friendly match. However, Poland did issue a set of stamps in 2018 to commemorate the 2018 FIFA World Cup, which took place in Russia from June 14 to July 15, 2018. The stamps featured various scenes and symbols related to the World Cup, but not specifically the friendly match between Poland and Nigeria.
If you're looking for more information on the friendly match or the World Cup stamps, please let me know and I'll do my best to help!