The Daily Mail is reporting that Dortmund are refusing to sell the 19-year-old talent this summer despite strong interest from Bayern Munich and Chelsea FC.
The playmaker currently has two years left on his contract with Dortmund and according to the same report, has not shown any intention of wanting to sign a new contract with the Blues.
According to the story, Dortmund had previously shown a willingness to listen to offers for Pulisic this summer but time is now running out for them to try and find a replacement.
The same article, though, says that the Bundesliga club may still be open to agreeing a deal this summer ahead of the actual transfer taking place next year, in a similar fashion to how Liverpool FC signed Naby Keita this summer.
Chelsea FC are thought to be on the lookout for a number of new signings this summer as they prepare for their first season under Maurizio Sarri at Stamford Bridge.
The Blues have only signed Jorginho and Rob Green so far and the Premier League transfer window for incoming signings closes at 17:00 on Thursday 9 August.
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