Christensen has spent the past two seasons on-loan at Borussia Monchengladbach and he has been a regular first-team fixture during that period, making 62 Bundesliga appearances and scoring five goals.
The German outfit were keen on making the move permanent this summer but the Blues are not entertaining any offers for the centre-back, who appears to have a bright future at Stamford Bridge.
Manager Antonio Conte has been impressed by what he has seen of the 21-year-old and the Italian tactician is eager to keep hold of his defenders, especially after the departure of John Terry.
Speaking about his immediate future, Christensen has confirmed he has been told to link up with the Premier League champions’ first team and look ahead to next season.
“I will join up with Chelsea on July 7,” he told BT. “I haven’t talked to Conte yet. I have talked to the sporting director and all those responsible for getting the players set up with a flat and what else belongs to them.
“The sports director says the plan is that I meet like all the others and go through the pre-season.”