Edin Dzeko has been backed into 8/11 with Sky Bet to be Jose Mourinho's first signing after his return to Chelsea.
Mourinho signed a four-year deal at Stamford Bridge on Monday, taking the reins of the club he steered to successive Premier League titles before his sacking in 2007.
Manchester City striker Dzeko has long been linked with an exit from the Etihad Stadium, with the Bosnian's desire for regular first-team football seeing him linked with some of Europe's biggest clubs.
A sustained run of bets on Tuesday morning has seen Dzeko backed from 20/1 into 8/11 to join Chelsea by the end of the summer transfer window.
Sky Bet's Richard Evison says: "All the money today seems to signal Edin Dzeko is set to a surprise switch to Stamford Bridge. The money has come following the appointment of Jose Mourinho, who maybe in the market for a big target man.
"We were 20/1 earlier this morning, but cutting the price has not put people off and we have been forced to cut the price to 8/11. City are currently 2/1 for the Premier League with Chelsea 9/4, will they be willing to sell to their potential title rivals?"