Respected German journalist Christian Falk says Bayer Leverkusen midfielder Kai Havertz can “imagine” himself playing for Chelsea.Reports claim Chelsea are keen on Havertz as part of Frank Lampard’s exciting plans for a Stamford Bridge overhaul.Timo Werner has reportedly already agreed a move to West London, with Roman Abramovich planning further spending.Pundits have tipped Havertz to make an exciting move to the Premier League, with the 20-year-old close to completing a fourth fantastic season with Leverkusen, with Manchester United also keen.Writing on Twitter, SportBILD journalist Falk provided an update on Havertz’s latest thinking.He wrote: “Because of many requests. True: Kai Havertz can imagine to play for Chelsea. True: there are already talks.“But: Chelsea is not the one and only club for Havertz,” adding Real Madrid, Barcelona, Bayern Munich and Newcastle to the list of clubs keeping an eye on the midfielder.Elsewhere, former Leverkusen head coach Reiner Calmund has insisted that Havertz will not be sold for less than 100million.He told Sky Germany (via Goal): “The transfer market will calm down a bit and the Leverkusen company has the idea of collecting 100 million for [Havertz].“The Leverkusen Trinity has decided that we won’t sell him for a cheaper price.“It will not be possible for the Catalans [Barcelona], they don’t have enough coal.“I know from decision-makers from Barcelona that they would like him, but that they would like to exchange a few players for him.“These players have high salary requirements, Bayer Leverkusen will not take part.”Havertz has scored five goals in four Bundesliga games since the German top flight restarted last month.The Germany international has been involved in 73 goals in 143 appearances for Leverkusen.READ MORE: Lampard has special plan if Chelsea sign West Ham star