NEW DELHI: India spinner Varun Chakravarthy has revealed that his build-up to the upcoming T20 World Cup is focused on trusting his lengths, staying mentally sharp, and pushing himself even in games that seem one-sided.

The 34-year-old has enjoyed a strong run in international cricket, picking up 51 wickets in 32 T20Is, including six scalps in the first three matches of the ongoing five-game series against South Africa.

With the T20 World Cup set to be played in India and Sri Lanka from February 7 to March 8, Chakravarthy is expected to play a key role in India's title defence, given his ability to control the middle overs and unsettle batters with his variations.

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"It is very important to keep putting pressure on yourself to get ready for the World Cup," the Karnataka-born spinner said on 'Follow The Blues' on Jiohotstar.

"You have to challenge yourself even when there is no challenge. If a match feels easy, you have to create that pressure mentally and start challenging yourself.

"Confidence, bowling the right lengths, and understanding the opposition are key. That is one major factor I want to take into the World Cup. With a better understanding of the opposition, I think I can do well."

Chakravarthy said that remaining true to the basics and having complete faith in his skill set have been central to his recent success on the international stage.

"My plan is simple, stick to the basics and bowl my length. Sometimes it works, and thankfully in the last three matches, it has worked well. I will try the same in the next match," he said.

India and South Africa are set to face off in the fifth and final T20I in Ahmedabad on Friday.

"When you are not confident, your mindset affects your skill. The key is to stay confident and back your skills. That is when you execute well, without much change. That is the secret to being consistent.

"At this level, you must be consistent, playing at the highest level is important to know where you stand," Chakravarthy said.

"In my first match at the international level, I struggled a bit initially and that’s when I understood a few things. I went back to practice and made corrections. So, it is very important to keep playing at the highest level."

(With PTI Inputs)