Sevilla have had plenty to celebrate so far this season. Getty Images

Sevilla president Jose Castro has said he is delighted with the club's start -- but called on his players to give even more in a quest for trophies.

The Europa League holders are third in La Liga, just a point behind leaders Atletico Madrid.

Sevilla spent €56.2 million over the summer to bring in 12 new players, and Castro told the club's official website: "We are thrilled, and the truth is that we want to continue to improve."

The club have lost just once under new manager Jorge Sampaoli, at Athletic Bilbao late last month, and have won every game at their Sanchez Pizjuan stadium.

"With [Manchester] City, we are the only team to have won all of our home games and that says something," Castro said.

"Our stadium is very difficult for any opponent and we are able to create an atmosphere like no other during games. We have to thank the fans for that and for their support.

"I hope we can continue to win [titles], but it's difficult. We have to value what we have achieved and be realistic."

Sevilla have made a solid start to Champions League Group H, taking four points, and Castro added: "We don't just want to be in the Champions League once in a while.

"To be there every year is what we aspire to, and the financial effort in order for that to happen is the biggest the club has made in our history.

"We signed players and increased our budget in order to heighten our objectives.

"We have a lot of new faces, and it always takes time to adapt and to find the rhythm. We want them to perform even better."