I don't think Saka's penalty was that bad. It was a bit slow and a bit low, but T-Bone only got it because he guessed the right side and was able to make a huge adjustment in the air.
Even when Martinelli isn't passing or shooting well, he's such a threat because they can't just let him get behind him. It reminds me a lot of Theo Walcott. For years he wasn't much good at crossing, wasn't much good at shooting, and didn't have the trickery to get around a defender, but was insanely fast. We all wanted him to either become a great striker or a great winger, but except for a brief half-season or so, he was mostly just fast. But, being mostly just fast is still incredibly unsettling. I love it when Martinelli can combine his speed with shooting. But, even when he doesn't have his shooting boots on, he forces defenders to stay a bit deeper just so they don't get burned. That opens up options for players who want to play between the lines.
As for PSG, they don't scare me like Madrid and Barcelona do. I don't think they'll be the pushovers they were in the group stage, but I don't think they're quite an elite team anymore. I think they're more at the Borussia Dortmund / RB Leipzig / Newcastle / Nottingham Forest sort of level. They just barely got past Aston Villa, and I don't consider Aston Villa to be elite either. That isn't to say it will be an easy game, or that Arsenal will definitely beat them. But, I think they're the weakest of the 4 remaining teams and there's no question that Arsenal can beat them.
There are parts of the world where outdoor spaces are basically unusable for most of the year because it's either too hot or too cold.
When the temperature is reasonable, you can use parks, forests, lakes, rivers, beaches, pedestrian malls, bike paths, etc. Many cities have public basketball courts, tennis courts, skate parks, hockey rinks, and similar things. In some less busy areas you can even use the streets. Street hockey and/or street futbol are pretty common in some areas.
But, extremely hot weather, or extremely cold weather can mean that being outside is terrible. You can dress warmly for winter, and that's fine to do sports. So, you could go cross-country skiing in the winter in a park. But, you can't really just hang out outside when it's -10C.
It would be great if there were more indoor options for places with bad winters and/or bad summers.