Bolt stated in an interview with The Guardian that he has "genuinely been talking to some people" regarding a switch from athletics to football, with an appearance on the Dortmund training ground mooted.

Watzke has now made it clear the 30-year-old will indeed join high-profile names such as Pierre-Emerick Aubameyang, Marco Reus and Mario Gotze, although he seems to have little chance of securing a permanent deal.

"This decision was made a while ago. Puma chief Bjorn Gulden, who is also part of our board of directors, told me some time ago that Usain had asked him if he could train with us sometime.

"I immediately said that was not a problem and the coach [Thomas Tuchel] is okay with it as well.

"It will obviously not happen when we have two games in one week, but probably when things are a bit more quiet. The team will like it as well.

Any suggestions that Bolt could soon be walking out on Signal Iduna Park as part of Tuchel's squad were dismissed by Watzke, however, as they plan to limit the Jamaican legend's link-up to the training field.

"We do not have to talk about us offering him a contract," he added. "But we feel flattered that he wants to train with us. It is an honour."

Bolt will go down as one of the all-time great Olympians having won nine gold medals across three Games in 100m, 200m and 4x100m relay.