Chelsea, who face Malmo in the second leg of their tie, are back at Stamford Bridge just three days after the supporters rounded on Sarri during the 2-0 defeat to Manchester United in the FA Cup.
The crowd were heard chanting ‘f*** Sarri-ball’ and ‘you don’t know what you’re doing’ at the Italian, who is under increasing pressure to keep his job.
Chelsea defender Rudiger said: “It’s always important the supporters are with us. Sometimes, for example at Manchester City [where they lost 6-0], you can understand they are furious.
“The emotions of the fans, no player can do anything about that. What we can do is get back results, then they’ll be behind us.”
The Blues meet Manchester City in the Carabao Cup Final on Sunday before a League game against Tottenham three days later which will be key to their hopes of finishing in the top four.
Rudiger admits that the showpiece occasion against Manchester City will demonstrate whether the campaign can be a success or not.
He added: “First of all, let’s speak about the Malmo game because it’s important for us to fight to win this competition.
“Then, on Sunday, a big game against City at Wembley. That will show the truth. That will show our way this season. It will be the truth in terms of [showing whether Chelsea are close to] keeping up with opponents like City Liverpool and Tottenham. What if it shows we are not that close? Then that is the reality.”
Rudiger says the squad are still fully behind Sarri. “You always play for your manager but you want results,” he added. “You want to win. No player likes to have the kind of run we’ve had.”
Chelsea have lost five of their last 10 matches, which included a 4-0 defeat at Bournemouth as well as the club record 6-0 Premier League loss against Manchester City.
Cesc Fabregas, who left Chelsea for Monaco last month, has backed the club to end the season on a high.
He said: “It’s difficult to experience 4-0 defeats, 6-0 defeats, but I believe in this team. I’m sure they can still win titles this year. They just need to put things together because now is the right time to do it.”