Chelsea defender Ricardo Carvalho admits his side need to improve before the start of the new season.
The 32-year-old made his first appearance in pre-season on Sunday after being given an extended break after his exploits with Portugal in the World Cup.
Chelsea began pre-season with a 1-0 win over Crystal Palace before losing 3-1 to Ajax and 2-1 to Eintracht Frankfurt.
His right they need to improve a lot.