You should. Ok, they lost a match they had to win considering that their aim is to get the pass for the OG, but nothing is decided until the last match Ofc they still have to play with Brazil, Russia.., but I honestly won't be such surprised if th winner of the WC will have more than one defeat, considering that after 4 days every team has been defeated at least once.
While it is OK to have hopes for Poland, I must say your task is getting really hard now. Italy and Russia are in a better position to gain more points, cause they already face their direct opponents, while Poland is still to face Brazil and Russia and even Italy and USA. Russia lost to Brazil but won agains Italy and is having a good chance to beat Poland as well. Italy lost to Russia but def Brazil and will not face these 2 teams any more. Besides I think in a clash between Italy and Poland, Italy is having a slight advantage, cause of a match up issues.
This World Cup goes fine for me so far, cause all 4 my favaroties: Russia, Poland, Italy and Argentina are in the 2-5 places and within the range of podium. While there is no hope to get Brazil out of there , I hope 2 of these 4 get the other 2 spots (preferably Russia and Poland). Still a long way to go for a better forcasting. Lots of surprises may occur. Serbia may finaly wake up and USA/Cuba and Iran are in the game too.