Three seasons ago, when Xavi came to Barcelona as their temporary solution, they did not expect him to help them winning La Liga but he did it with them last season. After success in past season, they expect to win Champions League this season and honestly it is not fair for Xavi.
Barcelona play worse than the last season and nearly fail against Real Madrid in La Liga this season but with many young players, many injuries, Xavi did not have best squad for Barcelona to perform best. In addition, young players need time to grow and to strengthen their mentality to deal with pressure. It is easy to sack Xavi but it will not guarantee that a new coach will help them to gain better success. We saw what happened with Barcelona after Enrique, they struggled some seasons before Xavi came and helped them to achieve La Liga title.
Firing the coach is always the first solution the team leadership targets when the club does not have good results to appease public opinion. 3 years is not a short time but not long enough to rebuild and build a strong club again. We can see that it took Jugen Klopp nearly a decade to rebuild Liverpool and help them regain their old glory.
Maybe the team's leadership does not have enough patience with Xavi, and the football philosophy he will build for Barca in the near future is not popular with them or the fans. To be fair, the mark Xavi left behind is not really clear, but he does not deserve to be treated like that by his students and the board of directors.
Arsenal were lucky to have conceded only one goal in that game, and hopefully coming to the second leg game they will be able to beat their opponent team FC Port having seen their performance got improved lately, though that the Portugal team side is really a tough opponent side to face, but I kind of think they will come to England to likely lock horns with gunners because that will be the perfect thing to do in this game coming to England on the second leg contest. Furthermore, Arsenal have got good home record this season and it will be an interesting match for the gunners because they are good at scoring goals.
Losing 1-0 to Porto in the first leg was really unfortunate for Arsenal as they played quite overwhelmingly but did not score a goal. Porto is always an unpleasant opponent in the UCL, but looking back at the teams entering the qualifying round, this is a much easier opponent for them. Hopefully the Emirates home field will help Arsenal play more confidently and win against Porto in the second leg.