Chelsea were dismal on Tuesday night as they were comfortably beaten 3-0 by Roma in the Champions League.
Roma took the lead within 45 seconds through a superb Stephan El Shaarawy striker and the in-form Italians proceeded to give Antonio Conte's side a lesson.
Chelsea had won three on the bounce since drawing 3-3 with Roma at Stamford Bridge but the humiliating defeat has put the Blues on the brink of crises once again.
Conte slammed his players "really, really bad" display and described last season's title-winning campaign as a "miracle".
“There is great disappointment for our second half because I didn’t see positive things," said Conte. "In the first half, I think we were unlucky. We created many chances and were unlucky we didn’t take them.
"But in the second half there is a great disappointment. That was really, really bad. Bad for a team like us. Last season we showed great hunger, great will to do something important. We won the league and did a miracle.
"But if we want to be competitive this season we have to avoid these ups and downs. A great team must have stability, you must have consistency, and great desire to be protagonists in every game. At this moment we are struggling a lot to find this type of balance.”
Signed from Roma over the summer, German defender Antonio Rudiger has impressed in recent weeks but looked out of his depth on Tuesday night - and was at fault for Roma's second goal.
The 24-year-old was slammed by legendary Premier League centre-half Rio Ferdinand at half-time.
"That’s appalling defending," Ferdinand said on BT Sport. "If you’re not sure where you are, clear the ball, always."
"Chelsea defending diagonal balls, they don’t know where they are. All of them."
Rudiger posts on Instagram
Chelsea fans were critical of his below-par performance but Rudiger's post on social media has earned their respect.
"It's hard to find the right words," wrote Rudiger on his Instagram story. "I am really sorry for the performance and the disappointing result, especially for the fans who travelled with us to Rome. But we will move forward and learn from games like this. We'll try to work our socks off now. There's already the next important match waiting for us on Sunday. We have to clear our minds and focus on the game against Manchester United."
See how Chelsea fans reacted to his post on Twitter - he's the only one who apologised to the supporters.