We can call it an unlucky day for Arsenal after several attempts ended in vain, but even if Porto win today they are not safe yet because Arsenal can turn things around in the next match we also know Arsenal can beat anyone who comes to their home base. Napoli and Barcelona only played a draw even though Barcelona dominated, they couldn't win it. The results of today's match are almost the same as yesterday's match and each team still has a chance in the second leg match.
It was a very painful defeat for Arsenal. They controlled the game but Porto had an excellent defense. Arsenal didn't even have a shot on target. But the match was a painful defeat for Arsenal because Porto was able to score a goal in the 94th minute. I think the match will end in a draw.
But this result still doesn't put Porto in a safe zone because Arsenal is a strong team and a 1 goal lead will only make a small difference. Arsenal will host the second leg so I think Arsenal still has a chance to turn things around.