Earlier this month, it was claimed that Aubameyang was 'on the verge' of joining Paris Saint-Germain.
Dortmund boss Thomas Tuchel has since played down such reports, although it is understood that PSG, in addition to Manchester City and Real Madrid, are interested in signing the 27-year-old this summer.
According to Bild, Aubameyang has now signalled his intention to leave Dortmund by handing in a transfer request, although the forward's Bundesliga side are not prepared to sell for anything under his market value.
The Gabon international scored 39 times for Dortmund during the 2016-17 campaign, while he has now registered 119 goals in 188 appearances for the German outfit since a move from Saint-Etienne in 2013.
Aubameyang started his professional career with AC Milan, but did not make a single first-team appearance for the Italian club before joining Saint-Etienne in 2011.