Answer
Gelfand trained under the Soviet Chess coach Vladimir Bagirov. Bagirov was a strong chess player himself, and he helped Gelfand to develop his skills and become a world-class chess player. Bagirov was a very demanding coach, and he pushed Gelfand to his limits. However, Gelfand appreciated Bagirov's coaching, and he credits him with helping him to become the player he is today.