Greece climb to 21st in the updated Elo NT ranking (if you're not familiar with the Elo ranking, it's the oldest (started in the 1950s compared to the FIFA coefficient ranking which was launched in 1993) and widely considered to be the most accurate NT football ranking (of course, it's only a guide, so it won't accurately predict every result). In fact after the 2018 WC ,FIFA changed its own coefficient ranking to base it on the Elo method.
https://www.eloratings.net/