Defender Carvalho has already made it known that he is unsure about his own future at Stamford Bridge but the Portugal international would prefer to concentrate on helping Chelsea overcome Manchester United in Moscow next Wednesday.
"Ronaldo has been fantastic for the Premier League," said Carvalho. "We have to try to not give him too much space. It is difficult to stop him but if you focus and work with your team-mates, it will be easy."
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