Sevilla has tough defender Sergio Ramos even though he is no longer young but his experience against the Catalan team is no longer in doubt, even though Sevilla got off to a bad start to the season but in my opinion they will definitely put up a fight against Barcelona, even though Sevilla are not the favorites but I am sure that Sevilla being able to get points from at least a draw is far more enough for Sevilla, but if luck is on Sevilla's side then that is a bonus.
The presence of Sergio Ramos in Sevilla's defense might make this team a little stronger, but that alone is not enough to withstand every Barcelona attack. It is not certain that Ramos will be used as the main starter, considering that Barcelona's players have speed and agility. meaning, Sevilla needs a combination of young and senior defenders. otherwise, their energy will be very drained in this match. In this match, it is very likely that Xavi will field his starting eleven to get full points. Thus, temporarily Barcelona will return to leading the top of the standings. The draw against Mallorca was the basis for Xavi not wanting to repeat only getting minor results. So, like it or not, Barcelona will play aggressively.
On the contrary, Sevilla has experienced an increase in performance in the last three matches. They won two matches, one match ended in a draw. In this match, it will be a difficult match for Sevilla. because, on paper, Barcelona will win this match. especially if we refer to the available odds, Barcelona with odds @1.39 and Sevilla with @7.20. Obviously, there is a gap that differentiates based on the odds. My estimate for this match is that Barcelona will score 3 goals, maybe Sevilla will only get 1 goal in return. So, the Under/Over option can be a betting option or a -1.5 handicap option with odds @1.95.
It seems you have forgotten the status that Sergio Ramos has, he is the captain of the national team and in addition he was previously captain at Real Madrid and the experience he has as a defender is not only a matter of days, but he is a champion in Europe and now the score is still even. Sevilla's defense is strong until now, they are able to withstand Barcelona's attacks, I'm sure this will end in a draw or win for Sevilla.