I believe Saudi Arabia's government gesture towards their victory against Argentina must have definitely influenced the players performance today, they've been the better side clearly attacking and pressing the Polish sides as they weren't the underdogs of the group before the opening match, Szczęsny with an outstanding first half performance to keep his team ahead after yet another controversial penalty was awarded in this tournament, at least this time it was with VAR's help.
I admit that KSA played very confidently today (KSA pressure on poland is very large), surely that came about because they beat Argentina in the first match. VAR made it difficult for Argentina in the match against KSA, this time KSA cannot rely on it because Poland has a different strategy.
~snip
Saudi Arabia play today was a lot more than I expected from them (before this one, I told everyone, even Saudi Arabia attacked Argentina after they conceived goal, and we (Serbia) just continued to form bus in front of our goal against Brasil, but they are obviously good team)
but, Poland scored, Saudis missed penalty, and everything goes down the sink, points for Poland, but chance against Mexico is still there for them