Chelsea’s record-signing managed to hit the net with both feet in the session, and should be ready to play in their up-coming clash against Brighton.
Blues’ boss Lampard was seen smiling while watching Havertz train, and his reaction was spotted by fans on Twitter.
One fan tweeted: “Lampard chatting with him with smiles all over his face.”
Havertz began training with the Chelsea squad on Saturday, less than 24 hours after he flew to England to complete his five-year deal.
He joined from Bayern Leverkusen this summer, and signed a contract with the Blues said to be worth £310,000-a-week
During his time in the Bundesligia last season, he scored 18 goals and provided nine assists.
The midfielder revealed that Lampard had a “big impact” on his move the Bridge, stating that he watched him very often during his playing career.
He added: “I think I can learn from him as a manager as well and I think he’s a very humble person.”
Havertz joins Chelsea’s other new summer signings Hakim Ziyech, Timo Werner, Ben Chilwell, Malang Sarr, Thiago Silva and Kai Havertz, as the club plan to mount a serious challenge for the title next season.
Chelsea fans may have to wait to see Ben Chilwell and Hakim Ziyech in action as the pair are both injury doubts for the match against Brighton.