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However, Leverkusen are holding out for a figure closer to€100m (£90m/$118m), and sporting director Rudi Voller has promised that there will be no"Covid discount" for the midfielder.
Havertz's final appearance of the campaign came during a 2-1 Europa League quarter-final defeat to Inter on Monday, during which he scored to take his tally for the season to 18 goals in all competitions.
The 21-year-old iskeen on a move to Stamford Bridge, and fellow Germany international Antonio Rudiger fueled speculation over an imminent move when asked to weigh in on his colleague's future in July.
"He is a great talent and he had a very good season. He is also very young and we will see what happens," said the Chelsea defender.
Havertz has even been favourably compared to former Blues playmaker Ballack, who won the Premier League and two FA Cups during his time in west London.
The Germany legend, who also enjoyed a spell at Leverkusen in the early stages of his career, believes Havertzwould be able to reach the next level under the stewardship of Lampard.
Ballack told Bildof the influence his old team-mate could have on the young forwardat Chelsea: "I firmly believe thatLampard would be 100 per cent behind Havertz.
"He likes players who are very dangerous in front of goal and there aren’t many of those.
"Havertz is a player that Lampard would help further develop, not least because he himself was a midfielder with an eye for goal, who was always moving into dangerous areas, looking to finish off a chance."