Chelsea opened talks to sign the midfielder, according to their sporting director Rudi Voller. The Blues are reported to have started negotiations with the Bundesliga side about a potential transfer of the 20-year-old this summer.
Roman Abramovich is willing to give Frank Lampard significant backing in the transfer market this summer, with a deal for RB Leipzig striker Timo Werner agreed 'in principle'.
Leicester left-back Ben Chilwell remains Chelsea's No 1 target this summer, while Hakim Ziyech will officially join Chelsea from Ajax in July.
Havertz, who is under contract at Leverkusen until June 2022, has attracted interest from a host of top European clubs, including Manchester United and Liverpool.
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