Chelsea could end up paying more than £2.5m for three teenage stars after a hearing in front of the Football League appeals committee.
Mourinho is keen to nurture young talent
The Premiership champions have been told to pay an initial £200,000 for Bristol Rovers' Scott Sinclair and £150,000 for Stockport's Harry Worley.
Gillingham's Ryan Bertrand will cost them an initial £125,000.
But the fees could rise considerably if the youngsters prove to be a success under Jose Mourinho at Stamford Bridge.
Stockport manager Chris Turner was satisfied with the outcome of the tribunal: "It's been a fair outcome for us. Ideally we would prefer the player to stay but I think we got fair monies up front.
"There's enormous potential, that's why we offered him a deal we had never offered a young player before, in terms of giving him a professional contract straight away at 17.
"This season he would have been progressing into our first-team squad like James Tunnicliffe is.
"It goes without saying, he's going to find a lot harder to progress to the Chelsea first team than he would have at Stockport.
"But he's got all the trappings of success around him down there and it can only give him good experience."