First, Rudiger and Christensen, the rest can wait

Thomas Tuchel is happy with the squad he has. The Chelsea boss wants to keep the majority of his team for the long term and the club are working on that.
Chelsea have got down to work. They are looking to renew their key players at the club. The priority right now is to extend the contracts of Andreas Christensen and Antonio Rudiger, 'The Sun' said.
Both central defenders are in the same situation. Both Christensen and Rudiger see their contracts expire in 2022. That means that, if the Blues cannot persuade them to renew, they will go for free next summer.
Christensen is convinced about staying. In fact, his new contract is practically ready. Rudiger's future seems more complicated as Real Madrid, PSG and Tottenham want him. The German is reportedly keen on a move to Spurs.
At Stamford Bridge, they also have other contracts which need renewing, but they can all wait, the British tabloid says. Once Christensen and Rudiger's futures have been resolved, they will look at the other contracts.