It's interesting to look forward to the match between Sevilla vs Barcelona although indeed, it looks like Barcelona will win I also probably won't doubt that to bet. But as for the actual final result, I wonder if Sevilla will be able to change quickly against a strong team. Because usually when a team like Sevilla doesn't always get a win against mediocre teams, they may change quickly against top teams. On paper it will still be difficult for Sevilla, but I personally will still be looking forward to their performance in that match but to bet I also wouldn't hesitate to bet for Barcelona to win.
Apparently, many bettors think like you and bet on Barcelona - the chances of it winning have changed 1.85 > 1.82 and will most likely fall even more by the beginning of the game. But as you correctly pointed out, Sevilla will have extra motivation against Barcelona, which are at least still a big name, so they will probably play much better than in their previous matches.
Barcelona's chances of winning will certainly be greater. many would bet on Barca's victory. but the betting odds seem to be getting smaller. I wouldn't bet for a big amount.
as already said, there is a possibility that Sevilla will give a surprise. they play at home and of course want to get their first win of the season.
or maybe make two bets for this match. will the odds offer to allow that? a draw or even a win for Sevilla?