In the first leg of the Porto vs Arsenal match, Arsenal did master the ball but that did not mean dominating the game. If you keep the ball in your area, back and forth from right to left, back to the goalkeeper, you control the ball. However, no shot to the goal is a silly thing done by Arsenal. Arsenal need to improve the front lines to be more effective in attack, this must be immediately improved if they want to win the match in the second leg and qualify for the next round.
Arsenal luckily maintained a draw until injury time and Raya did some excellent saves for Arsenal. If Raya did not make those great saves, Arsenal even get a conceded goal sooner than that. The match shows that Arsenal are not stronger than Porto but they will have opportunity at home. Because they are equal in quality, the second match will be very tight and exciting. Any team can score a first goal in the next match will have high opportunity to win in an aggregated result.
In this fight when viewed from the game this result is fair enough for Porto who came with plans and got three points at home. Arsenal did not guarantee a draw let alone victory, because Arsenal played a very negative game. There is no ambition, there is no substitute for managers, only one change of players. Porto knows they have to try harder to bring something to London to play and I still think Arsenal will turn things around at the Emirates Stadium.
Porto did created a lot of pressure on Arsenal and they really deserve this win even the late goal makes some people think that Arsenal deserve to have a draw. Porto are very experience in Champions League and they will not come to England and play against Arsenal with fear.