Antonio Rudiger sealed his move to Chelsea on a £34m move from Roma last week, becoming the English Champions first major signing of the summer.The ex-Roma defender is looking forward to playing for a big club and he is hoping to learn from his new boss, Antonio Conte as a coach.Rudiger pointed out the improvement in Victor Moses and Marcos Alonso as factors in his decision.And the 23-year-old thinks his new club is on a different level to his old one.Rudiger said: "Not to be disrespectful, but when you speak about Roma and Chelsea, Chelsea is a big club."Roma is a big club too, in Italy, but I think Chelsea is a different level."Of course, for me, the biggest reason was the coach, Antonio Conte.He's a fantastic coach."He improved a lot of players, like last season Moses and Alonso."They had a great season and I that's why I said I want to be a part of that."The defender helped his Germany to win the Confederation Cup in Russia after defeating Chile 1 nil in the final.