I saw him (Sunil Narine) play in the Indian Premier League and thought, 'this looks pretty different', so I watched him bowl on YouTube and tried it in the backyard. I've trained to the point where it's coming out well now.
Nair on studying Narine's doosra, quoted on The Sydney Morning Herald, "Arjun Nair is a name to remember, says Cricket Australia's Greg Chappell", January 30, 2016.