There are many possibilities and scenarios that could happen in the second leg, you can see in the picture below, Arsenal is the favorite with only @1,24 odds. But we know that Porto have an advantage on the aggregate side which makes them more confident in playing defensively.
Well, with all of these and as I said before, I wouldn't bet on this match because the risk is too high.
I can't believing with sport bookie how come giving large odds for FC Porto who won the first leg match, actually difficult acceptable and interested for put betting to bet Porto looking for the match result on first leg not close the potential win back to back on away and home match. I think FC Porto have advantage with aggregate 1-0 and they not in under pressure position for facing Arsenal in second leg. Don't losses bigger opportunity with unbelievable odds and I think FC Porto has chance for defeating Arsenal in their home match.
Well, with all of these and as I said before, I wouldn't bet on this match because the risk is too high.
Have two weeks later for second leg match between Arsenal vs FC Porto, Arsenal return to winning performed in domestic league after defeating Newcastle United last match but I don't think easily for defeating Porto on second leg match.
Arsenal are in terrific form, and it will be very difficult for Porto to defeat Arsenal at home, because even the first leg was a lucky goal for Porto. Arteta will not want to lose that game, so they will not make the same mistakes again. Arsenal will play an attacking game because Porto leads them by one goal, and Porto can play a defending game, making it difficult for Arteta to get into their box to score. Arsenal's match yesterday demonstrated that they are prepared for Porto in the second leg; if Porto defeats Arsenal again, it will be a shame for Arteta, but I know Arsenal will do everything to win the match.
Arsenal and Bayern Munich lose the first leg, they need to change their information in the second leg, I just believe because arsenal and Bayern are at home in the second leg, they will get home advantage to defeat their opponent because everyone has the belief that they will win the match. Lazio are not better than Bayern Munich this season which will cause them to defeat them, is only Porto I believe they are in good form to compete with Arsenal, their second leg will be very tough. but Arteta can get the winning game because they can get more advantage at home let see what will happen in the second leg who will get the opportunity to qualify to the quarter-finals.