Chelsea -bound Kai Havertz was released from the Germany squad as a result of Covid-19.
The 21-year-old had been called up to Joachim Low's side to face Spain in the Nations League.
But the midfielder started on the bench and did not get on the pitch as the match ended 1-1.
Havertz, who has seven caps, will not face Switzerland on Friday and instead looks set to be confirmed as Frank Lampard's sixth signing of the summer.
A deal worth up to £70m has been agreed with Bayer Leverkusen, a considerable chunk less than the £90m they had demanded earlier in the transfer window.
And Germany manager Low has revealed why the coronavirus crisis has forced him into letting the youngster go.
He said: “[We] didn’t want to take another risk that something could be endangered in this deal.
"There is the problem that if he has signed the contract and enters Switzerland, he may have to be in quarantine.
“We knew that the last details would be clarified today and tomorrow with his contract with Chelsea. The player was a bit torn.
"On the one hand, he wanted to join the national team. On the other hand, he absolutely wants to take this step.
“Of course, we also know about the importance and magnitude [of the move]. That is of course a huge story."
Havertz looks set to become the latest arrival at Stamford Bridge, following the signings of Hakim Ziyech, Timo Werner, Thiago Silva, Ben Chilwell and Malang Sarr.
Germany chief Olivier Bierhoff admitted that he had been talking to Leverkusen sporting director Rudi Voller over the move and insisted a move to Chelsea will benefit the national side.
He said: “The future belongs to Kai, both at a club level and with the national team.
"Obviously we’d have preferred it if he was able to concentrate fully on the start of the international campaign, but we’re aware of the importance of the move for both Bayer 04 Leverkusen and Kai, so we want to deal with it responsibly.
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“At the same time, it’s an honour and a big compliment for German football when young German players are in demand by top international clubs.
"The national team can also benefit from the experience these players gain abroad — both in terms of sport and personal development.
"We’ve been in constant communication with Rudi Voller in order to find a good solution together.”