The former Manor and Sauber F1 driver completed a half-day run with HWA ahead of the team, which is a precursor to Mercedes joining FE as a works operation in 2019/20, making its debut in the electric championship in season five.

Fritz explained that HWA had "talked to him" and that Wehrlein also delivered "a good performance" during his FE run, "but at the time when we would have liked to have made the decision, Pascal's focus was very clear: to return to F1".

"Which I can also understand and comprehend," Fritz continued.

Wehrlein, who has also tested for the Mahindra FE squad that is yet to announce its season five line-up, will leave the Mercedes motorsport family at the end of 2018.

It is understood that Mercedes wanted Wehrlein to commit to a three-year FE programme, but he did not want to enter into long-term deal that would disrupt his chances of making it back to F1.

"I don't want to set up a Formula E team where, after two races, a driver says that he'll be going straight back because he wants to enter F1," said Fritz.

""The expectation of us was that Pascal would then decide in favour of FE in the longer term.

"He couldn't and didn't want to do that at that moment. [That was] understood, respected and accepted. Accordingly, this project did not come about in its present form.

"We never really got into any further talks. Because it just didn't fit together."

HWA has announced Gary Paffett as its first FE driver for season five, with news on its second driver expected in the coming days.