On what basis do you say that, though? There are players of a certain style, who would need to play very differently in doubles and so things could conflict. That is not Ram's case. in fact, I have always felt that he is one player who does pretty much similar things in singles and doubles, and his strengths in singles are pretty much his strengths in doubles too (though his weaknesses in singles may be less of weaknesses in doubles). So I am curious why you felt that way.
I have not noticed any correlation between his doubles work and his wins/losses in singles either.