Players like Manchester City's David Silva, Willian at Chelsea, or PSG's Thiago Silva and Edinson Cavani, will be free to leave on July 1 even if the season has not been completed.
Premier League: Fourth placed Chelsea will take on Southampton at Stamford Bridge on Friday.
Frank Lampard will hope Willian can inspire a return to home form when Southampton visit Stamford Bridge on Thursday.
Chelsea registered a 2-0 win at Tottenham on Sunday that featured a double from Willian, a red card for Son Heung-min and allegations of racist abuse.
Arjun Kapoor interviewed Chelsea's Brazilian star Willian but fans were left unimpressed and with some trolling him for asking "pathetic questions".
Champions League: Mohamed Salah's brace helped Liverpool clinch crucial points against Red Bull Salzburg.
Goals from Pedro Rodriguez, Willian and Callum Hudson-Odoi earned Chelsea a 3-0 win over Dynamo Kiev at Stamford Bridge.
Chelsea won their second knockout match in a matter of days after a midweek penalty shoot-out victory over Tottenham Hotspur in the League Cup.
Arsenal defeated Ukraine's Vorskla Poltava 4-2 in the Europa League, while in-form Chelsea registered a 1-0 win away to PAOK in Greece.
Conte was dismissed just four weeks before the start of the season despite winning the Premier League in his debut campaign and the FA Cup last season.
Courtois' future at Stamford Bridge remains uncertain, but Sarri hopes the Belgium goalkeeper will stay.
The teams meet in Kazan on Friday evening with Brazil the favourites, despite the quality in a Belgian side captained by Hazard, who plays with Willian at Chelsea.
After successive defeats by Manchester City and Manchester United, injury-hit Palace proved to be the ideal opponents for Antonio Conte's side at Stamford Bridge.
Just four days before facing Barcelona in the first leg of their Champions League last 16 tie, Conte named a much-changed side with Thibaut Courtois, Cesar Azpilicueta, N'Golo Kante and Eden Hazard not even included in the Italian's squad.
Chelsea rested the likes of Eden Hazard and Cesc Fabregas for the Premier League match against Stoke City.
Looking to bounce back from the trauma of letting a 3-0 lead slip in their 3-3 draw at Sevilla in the Champions League, Liverpool went ahead in the 65th minute through former Chelsea man Mohamed Salah.
Willian scored twice and won a pair of penalties as Chelsea thrashed 10-man Qarabag 4-0 in Baku to guarantee Antonio Conte's side a top-two finish in Group C.
Dele Alli and Harry Kane kept Tottenham Hotspur in the Premier League title hunt as their side torpedoed Arsenal 2-0 while Chelsea maintained their advantage by winning 3-0 at Everton earlier in the day.