Chelsea have now received updates from the Bundesliga giant as the Blues are reportedly working to sign a new forward to strengthen the attacking line ahead of next season.
Chelsea have shown interest in signing Dortmund star Erling Halaand since last summer, but still keen on sealing the deal this summer.
Report has claimed that the Bundesliga team Borussia Dortmund wants Chelsea star Timo Werner with £70m bid for the Norwegian.
Chelsea head coach Thomas Tuchel has expressed interest in the Bundesliga star as he wants to reinforce the attacking line.
The blues has been taken to the champions league quarter final by Tuchel, and he still eye finishing at top four in the premier league table this season.