The keeper swapped El Madrigal for the Ramon Sanchez Pizjuan, but insisted that it was the right decision, despite earning a lower wage and being in competition with Andres Palop
The former Real Madrid keeper signed a five-year deal from relegated Villarreal in June, but will have compete with Andres Palop for a starting berth at the Ramon Sanchez Pizjuan, after coach Michel revealed that his captain would be staying at the club.
Nevertheless, the 30-year-old insisted that the has been made to feel very welcome and is looking forward to the new challenge.
"I came with an idea. There are two more goalkeepers here and I came here without knowing who would carry on. These are things that go beyond my signing," he told SFC Radio.
And asked whether it was worth signing for the Andalusians despite having to take a pay cut, Diego Lopez was unequivocal.
"Of course. Sevilla chose me, paid my transfer fee and gave me a five-year deal. I also had to give in and do my bit [by accepting a lower wage]."
And the shot-stopper revealed that he has been made to feel very comfortable, and is looking forward to his battle with Palop.
"It is as if I already knew them all, I am very happy to be here," he was quoted as saying by AS.
"You have to fight for your place. There are two players fighting for one place, like in other areas of the pitch, and you have to work with enthusiasm and intensity. After that it is the coach's decision.
"We should worry about working and maintaining a united group because, after all, the one that plays is going to be capable and that will benefit the team."
Diego Lopez, who was Spain's third-choice goalkeeper at the 2010 World Cup, also praised the work-rate of his new team-mates.
"I have never been in a team that works with so much intensity in training," he continued.
"From the first day the competition, intensity and the work have been very good, we hope that that is seen where it has to be seen [this season].
"Considering that the first few games make up an important part of the season, we have to arrive at 1000 per cent for the first game, because those games will be fundamental before we play Real Madrid at home [on the fourth weekend]."