Signing Kai Havertz from Bayer Leverkusen would be a "statement of intent" from Chelsea, according to Craig Burley.
Frank Lampard looks set to make a number of key changes to his Chelsea squad this summer, with the club in a strong financial position after two transfer windows of inactivity.
The Blues are set to sign Timo Werner from RB Leipzig after seeing off rival interest from Liverpool, Manchester United, Bayern Munich and Real Madrid.
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The German striker looks set to become the second signing of Lampard's reign, following Chelsea's £33 million ($42m) capture of Ajax winger Hakim Ziyech back in February.