From now on, Sevilla could lose their focus on the title and this could be a huge opportunity for Barcelona to leave them behind in the standings also. There is a gap like five points between them for now and Barcelona have one missing game also. However we have an El Clasico ahead in only five days. This is going to be one of the crucial games for both sides. Real Madrid will target to defeat Barcelona to close in on the title much more. And Barcelona will not want to get away from Sevilla. I can't wait to see it.
I think Barcelona have a real chance to overtake Sevilla in the laliga standings, they are just five points behind Sevilla having played a game less, and honestly i think Xavi deserves an awful amount of credit for what he has done since his arrival, especially with how he has brought back the winning mentality into the team, another thing to note is the signings he has made, he made really good signings and that is why Barcelona's performances have improved lately and greatly. I think Barcelona will finish 2nd, and it will really be a good finish for them considering how far they were from the top of the table some weeks ago.
This El Classico is going to be Barca's first big test since they started playing excellently well again, if they win it, then it will increase the morale of the team and it is a big plus for them, they prolly would not win the league, but if they finish this season on a high, it will help them in their push/challenge for the title next season.