While he needs captain's confidence but Raju wants the UP spinner to find a solution to get back to prime form.
"But unfortunately, we all knew how captains had played a big role in Kuldeep growth. He has been always saying that he was very comfortable playing under (Mahendra Singh) Dhoni, but Dhoni is not going to be there for him till his career is over, so hopefully he has to come with a solution," Raju, one of Anil Kumble's distinguished spin bowling partner till late 90's, said.
Raju advised Kuldeep, who has 170 international wickets across 91 games, to bowl to his strengths, which is hitting attacking lines.
"He (Kuldeep) is still a very fantastic bowler. He is very young, so (when) you already have experience of playing international cricket…it is entirely up to him to concentrate and he has always been a wicket-taker, he has not been a defensive bowler."
Raju wants him to make use of the limited opportunities he will get in Sri Lanka
"He should bowl the way he knows and you get limited opportunities and luckily for him, this (Sri Lanka) tour has come up, and there won't be much pressure on him, he has to bowl the best he can because we all know he has got that variety," elaborated Raju.
Once he picks wickets, the question raised about his waning abilities will subside on its own, said the left-arm orthodox spinner from Hyderabad.
"He (Kuldeep) is a young guy (and) he is a match-winner. So, I think he should be more confident and then let his cricket do the talking. He has to work hard for it, cricket is not easy and he also knows that," Raju told PTI in an interview on Friday.
Apart from Kuldeep, Raju, who picked 589 first-class wickets from 177 games, preferred all-rounder Ravindra Jadeja and Yuzvendra Chahal to be in the Indian squad for the T20 World Cup, which will be played in UAE and Oman from October 17 to November 14.
"You already have Ravindra Jadeja right, he has been playing brilliantly, Jadeja will be the first choice (as he is a) brilliant all-rounder – the ideal for T20s."
Whatworks for Kuldeep is the fact that he can pick wickets in clutches if he happens to get a breakthrough.
"Kuldeep has good habit, when he picks a single wicket, he ends up taking two or three (wickets). So, I think he should also be a part of (T20 World )," said Raju.