New Delhi, Nov 13 - Indian Air Force (IAF) Air Chief Marshal P. V. Naik Friday downplayed China's sale of fighter jets to Pakistan and said there was no need to be "under confident" with respect to China.

"When two sovereign countries (in this case China and Pakistan) interact there is no scope for a third country. It is up to them (China) to sell it... Why are you so under confident? Our country is strong enough," Naik told reporters on the sidelines of the 49th Indian Aerospace Medicine Conference.

China has signed a contract with Pakistan to sell at least 36 advanced J-10 fighter jets in a deal worth $1.4 billion. The J-10 is a multi-role fighter configured for air-to-air and air-to-ground missions.

Aviation experts say the design is based on the cancelled Israeli Lavi lightweight fighter and that Israel provided the technology for the fighter's fly by wire controls. It is powered by a Russian engine. The J-10 entered service with the Chinese Air Force in 2003.

"Your army, navy and air force will look after the interests of the country. You (media) do not worry about it and do not make others worry about it," Naik said.