Sevilla's defensive improvements have been impressive over the past few seasons, with their defense ranking among the top in La Liga this season. The club has made significant strides in improving their defensive capabilities, which is evident from their clean sheets and fewer vulnerabilities.

One of the key areas where Sevilla has improved defensively is in their defensive line. The team has been working to improve their physical appearance and conditioning, as well as their defensive skills. They have also been investing in new equipment, such as goalkeeper Alvaro Morata, who has brought a new level of quality to their defense.

In addition to improving their physical appearance, Sevilla has also been focusing on improving their defensive tactics. The club has been experimenting with different formations and strategies, which has helped them to create more chances for themselves. This has resulted in fewer opportunities for their opponents to score, which has helped to keep them ahead of their rivals.

Another area where Sevilla has made progress defensively is in their ability to defend against attackers. The club has been working to develop their players' defensive skills, which has helped to make them more effective at defending against attacks. This has allowed them to create more opportunities for themselves, which has helped to keep their opponents at bay.

Overall, Sevilla's defensive improvements have been a major factor in their success this season. Their clean sheets and fewer vulnerabilities have helped to keep their opponents at bay, while their defensive capabilities have allowed them to stay ahead of their competition. With continued investment in their defense, it will be interesting to see how they continue to evolve and improve in the coming seasons.