The Blues appeared to be closing in on a deal to re-sign Romelu Lukaku from Everton this summer.
But they are now having to explore alternative targets after Manchester United hijacked their bid for the Belgian frontman.
Aubameyang, 28, is one of several top strikers consequently being linked with a move to Stamford Bridge.
The Gabon international has emerged as one of Europe's most prolific forwards during his time with Dortmund.
And Betway believe he will soon be testing himself in the Premier League.
Pierre-Emerick Aubameyang club after summer transfer window odds
“The Dortmund striker is now odds-on at 8/11 to join the Premier League champions this summer”
They reckon Alvaro Morata is set to seal a move to AC Milan, apparently paving the way for Chelsea to sign Aubameyang.
“With Diego Costa heading for the exit door and Romelu Lukaku opting for Manchester United, Pierre-Emerick Aubameyang looks set to answer Antonio Conte’s striker woes," said
"The Dortmund striker is now odds-on at 8/11 to join the Premier League champions this summer.
“The 28-year-old was previously priced at 5/4 to move to Stamford Bridge, but with long-term target Alvaro Morata (1/5) on the verge of joining AC Milan, the Aubameyang deal looks more likely than ever and a flurry of bets has seen the striker backed into 8/11 to join the Blues.”