Bournemouth have strengthened their defence ahead of the new Premier League season by completing the signing of Portuguese centre-back Antonio Silva from Benfica in a deal reportedly worth £25 million ($33 million).The highly rated 22-year-old arrives on the south coast with extensive top-level experience despite his age and is expected to play a key role in Bournemouth's backline following the departure of Marcos Senesi.Cherries continue busy summer rebuildSilva becomes Bournemouth's second signing in quick succession after the club secured the arrival of forward Alvaro Rodriguez from Spanish side Elche earlier this week.The Portugal international has been brought in to replace Senesi, who recently completed a free transfer to Tottenham, leaving Bournemouth searching for a proven central defender before the new campaign.Benfica academy graduate leaves after trophy-filled spellA product of Benfica's renowned youth academy, Silva established himself as one of Portugal's brightest defensive talents over the past few seasons.He made 235 senior appearances for the Lisbon giants and helped the club lift six major trophies, earning a reputation for his composure, leadership and consistency at the heart of defence.His performances also attracted attention on the international stage, where he has earned 20 caps for Portugal.Silva represented his country at the 2022 FIFA World Cup and UEFA Euro 2024, although he missed out on Portugal's squad for the recently concluded FIFA World Cup in North America.Silva eager for Premier League challengeSpeaking after completing the move, Silva said he was excited to begin the next chapter of his career in England.He described joining Bournemouth and playing in the Premier League as a proud moment and said he was looking forward to meeting his new teammates and helping the club achieve its ambitions.Silva also pledged to give everything for the supporters, saying his focus would be on contributing to victories and making the most of the facilities and environment at the club.Bournemouth add experience ahead of new seasonThe signing underlines Bournemouth's intent to reinforce key areas of the squad before the Premier League kicks off.With Silva's experience in European competition and international football, the club will hope the Portuguese defender can quickly adapt to English football and provide stability at the back as Bournemouth aim for another strong campaign in the Premier League.