West Indian cricket legend Viv Richards has backed Sachin Tendulkar to continue despite his poor form, saying the senior Indian batsman is the best person to decide on his retirement and should continue as long as he wants.Richards said nobody is qualified enough to tell Sachin when they think he should go," Richards told 'BBC Radio Shropshire'.There have been mixed views on Tendulkar's future with some former Indian cricketers such as Sunil Gavaskar, Mohinder Amarnath, Dilip Vengsarkar and Sourav Ganguly urging him to have a chat with the selectors on his retirement plan.