Sevilla's season has been one of significant improvement, with key defenses contributing greatly to their success. The team has shown remarkable resilience and determination in recent matches, which can be attributed to their strong defense.

One of the standout players for Sevilla this season is Javi Martinez, who has become a key player for the team. His leadership on the pitch has been instrumental in helping his teammates perform better. He has also made several important saves during crucial moments of games, which have contributed significantly to Sevilla's victories.

Another key defender for Sevilla is Pablo Sarabia, who has been impressive in both defensive and attacking roles. His versatility has allowed him to contribute to Sevilla's overall performance. He has also been instrumental in preventing goals against opposition teams.

The defensive efforts of both Martinez and Sarabia have helped Sevilla maintain a solid defense throughout the season. They have kept many clean sheets, which has been essential in securing victory for the team.

In conclusion, Sevilla's improvement this season is largely due to their strong defense. The contributions of players like Javi Martinez and Pablo Sarabia have been vital in keeping their opponents at bay. With continued improvements from these players and others, Sevilla will undoubtedly continue to dominate their league and achieve further success.