Andriy Shevchenko has been given a vote of confidence by Chelsea manager Jose Mourinho and captain John Terry, after being criticised for recent displays.
Shevchenko has not scored since the 2-1 defeat at Boro in August
The 30-year-old striker, who cost £30m from AC Milan in May, has scored just twice in 10 games so far this season.
But after Match of the Day pundit Alan Hansen called him "heavy-legged", Mourinho said: "He is just lacking the one goal which will give confidence."
Terry added: "Sheva's goals will come but his work and input are there."
Andriy already has the beating of his markers in one-on-ones and he shows great speed of movement
The England skipper continued: "I hope everyone noticed his role in the first goal in Sofia in the Champions League last week.
"He came deep, took a pass, held off a defender and curled the ball out wide to Paulo Ferreira.
"That's how we got the space to deliver the cross from which we ultimately scored, so he's playing his part."
After a subdued display in the 1-1 home draw with Aston Villa on Saturday, Hansen expressed his fears for the Ukraine striker.
"When we saw him at the World Cup, he'd been out for a long time and the argument was that he wasn't fit.
"I keep on hearing and reading that he's going to get better and in time he will score goals.
"I'm not so sure. His performances so far in the Premiership have not been that great and when Michael Ballack and Joe Cole come back, I'm not sure he's going to play."
But Mourinho told Portuguese newspaper O Jogo: "He played very well up front against Villa.
"He is better physically, he already has the beating of his markers in one-on-ones and he shows great speed of movement.
"The work he put in for the team when without the ball was very good."