Tottenham have completed a deal for Cologne defender Kevin Wimmer and he will join them in June, Sky sources understand.
Chelsea's technical director Michael Emenalo believes the club's use of the loan system will lead to a seamless transition when the current first-team crop needs replacing.
The Europa League holders have taken full advantage of sending out their players on temporary deals in recent years, a pattern that is continuing this season.
The likes of Thibaut Courtois, Oriol Romeu, Wallace, Victor Moses and Romelu Lukaku have all left Stamford Bridge on loan moves over the course of the summer but Emenalo reckons it will benefit the Blues in the future.
"The loan process at Chelsea has become very professional and a good deal of thought has gone into it," he told chelseafc.com.
"We don't send players out because we are trying to recover some money, we send them because we want them to play and develop and we want to monitor them.
"We have a system in place, headed by me and with Eddie Newton supported by [head of player welfare] Kevin Campello, that means we keep a close eye on them and the manager knows exactly what is happening at all times."
Ryan Bertrand and Kevin De Bruyne are likely to play a large part in Chelsea's season as Jose Mourinho looks to secure silverware on his return to the club.
Both have been sent out on loan in recent years to develop their potential and expose them to first-team opportunities and Emenalo has backed the loan system to help prepare younger players adapt to life in the Chelsea first team.
He said: "When I came here six years ago we had great players but what we had below those great players were players too young and too far apart to be able to integrate them.
"Now we have great players and they are not so far apart.
"Now we have a player like Frank Lampard at 35 but then we have quality players in Ramires, John Mikel Obi, Michael Essien and Marco van Ginkel, and then we have from the Academy young players who can come in and do the job like Nathaniel Chalobah and Josh McEachran.
"We are trying to bridge the gap and at left-back now, behind Ashley Cole, we have Ryan Bertrand but we also have Patrick van Aanholt.
"By the time those older guys are 27, the younger ones will be around 22 and ready. The gap is not too big and that makes it easier to bring through young players."