The Blues are reportedly close to signing the 21-year-old midfielder from Bayer Leverkusen.
And Ballack has fully supported his compatriot moving to Stamford Bridge.
"I firmly believe that Lampard would be 100 per cent behind Havertz," Ballack told Bild.
"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."