Sprint star Usain Bolt is set to train with German football team Borussia Dortmund on Friday.

The Bundesliga club says the eight-time Olympic champion, whose last race before retirement was at the 2017 world championships, will "participate in an open training session" with coach Peter Stoeger's side.

Bolt posted a picture of himself in a Dortmund shirt on Twitter, saying, "BVB, get ready for Friday."

Dortmund, which shares a sponsor with Bolt in sportswear giant Puma, had long said that the 31-year-old could train with the team at some stage.

Dortmund's next game after the international break is at Bayern Munich on March 31. Bayern can secure the league title then if other results go its way.