Werner, who scored 34 goals for RB Leipzig last season, was heavily linked with a move to Premier League champion Liverpool but said he opted for Chelsea as he was convinced he would thrive in Lampard's system.
"It wasn't the hills that gave me my speed, it was me thinking about how you have to train and work hard and be fit enough to go past defenders".
With striker Timo Werner and winger Hakim Ziyech also joining the club in the close season, Havertz is expected to slot in at the No 10 position behind the striker.
After Werner's arrival at Stamford Bridge was confirmed, Rudiger claimed to have acted as an agent in persuading his compatriot to swap the Bundesliga for the Premier League.
"I'll support them through that time and hopefully we will see a lot of great things really soon".
'English football is very fast and there are a lot of different styles of football, sometimes with five or three at the back, sometimes like us with four at the back, ' added Werner.
"I loved [Lampard] as a player".
Nadal ruthless in Rome, Halep and Azarenka win
But I don't think I'll have any major issues coming back to the tour and being able to perform well and hit the tennis ball". Serena Williams, suffering from an Achilles tendon problem, and US Open champion Naomi Osaka will also skip the Rome event.
I'm trying to focus on football and trying to play my best football here in Chelsea. We have some very good but calm and nice players.
"But he called me a lot, we had a lot of conversations, he texted me a lot and he sent me some videos where he could show me what style of football he wants to play with me in it".
"Of course it's a big price tag but I think in football today it is normal to pay these prices", said the former Bayer Leverkusen player.
"When you have an academy that runs like Chelsea's and they develop players like Mason, Tammy, Fikayo [Tomori] from the age of eight or nine, they have a real feeling for the club". He became Stuttgart's youngest-ever scorer in the Bundesliga, aged 17 years, six months and 16 days and, six weeks later, he was the first 17-year-old to score twice in a Bundesliga game.
Havertz arrives with a reputation as an attacking midfield talent and believes he has signed for the flawless manager in Frank Lampard, the Chelsea boss the fifth-highest scoring player in Premier League history and regarded as the greatest goalscoring midfielder of his generation.
"For me, it was the right time to say "Ok I want to try something new".
'He looked sharp against Brighton and I saw him against Spain the other day - he tore them one'. I found out a lot from the supervisor [Julian Nagelsmann] about the playing design.