Chelsea have confirmed the signing of midfielder Kai Havertz from Bayer Leverkusen.

The 21-year-old has signed a 5-year deal and will join up with the first-team squad soon, having left the German national team camp before their Nations League fixture with Switzerland which he will no longer take part in.

The total transfer fee is reportedly compromised of €70m (£62.5m) up front plus another €10m (£8.9m) in add-ons depending on how Chelsea perform both domestically and in Europe over the next 5 years.

On signing, Havertz said: “I am very happy and proud to be here. For me it is a dream come true to play in a big club like Chelsea and I can’t wait to meet all the players and the trainers. Yeah, I am very happy to be here!”

Club director Marina Granovskaia added: “Kai is one of the best players of his age in world football, so we are very happy that his future lies at Chelsea. He has proven pedigree in one of the best leagues in Europe, he plays for the German national side and he is an exciting, dynamic talent. We are delighted to be able to add his versatility and quality to the squad before the season begins.”

The youngster’s arrival marks Chelsea’s sixth major signing of the summer – after Hakim Ziyech, Timo Werner, Ben Chilwell, Malang Sarr and Thiago Silva – but the Blues’ business is unlikely to end there.

Chelsea are still in the market for a goalkeeper, with Rennes’ Edouard Mendy being linked with a move to Stamford Bridge where he would likely provide Kepa Arrizabalaga with strong competition rather than directly replace him.

Even after signing both Sarr and Silva in that position, the Blues are still said to be showing interest in West Ham’s Declan Rice who Lampard reportedly wants to use as a centre-back, which is the position that he played in his youth career.