Manchester City acquired Eliaquim Mangala in a £32 million transfer agreement with Porto this summer, but reports on Tuesday indicated that the center-back will not be ready to play when the club starts their English Premier League campaign.

Mangala, who is now the most expensive defender in the Premier League, admitted that he is still not in perfect shape to start the season with his new club because he has not played since France's 1-1 draw against Paraguay on June 1.

The 23-year-old center-back, who expressed excitement about moving to Manchester City, made France's final roster for the 2014 FIFA World Cup in Brazil, but was not used for the entire tournament.

"I am happy now because I will be able to start a new adventure. I will be able to train again," Mangala said in a statement posted on the club's official website. "Holidays are great but, if the time is too long, it is difficult to come back. I think that I will need a bit of time in order to be 100 percent, but it is normal."

Meanwhile, Manchester City also secured a long-term deal with David Silva, who agreed to stay at the Etihad Stadium until after the 2019 season.

Silva, who scored seven goals and had nine assists in 26 Premier League games last season, said that he saw no reason to leave Manchester City after enjoying success with the club since moving from Valencia in 2010.

The 28-year-old midfielder helped the club win two Premier League titles, one FA Cup and one Capital Cup over the past four years, and the Spain international is confident that the club will continue to rack up silverwares in the next several years.

"On and off the pitch, I feel incredibly content and fulfilled professionally and personally, so why wouldn't I want to stay and keep winning trophies with this fantastic team?" Silva said. "Over the last four years, we have achieved so much together, establishing City as a dominating force in England and now, when I look around this dressing room, I can see no reason why we won't become one of the top teams in the world."

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