Answer
Ernesto Valverde was Llorente's first professional coach. Valverde was the coach of Athletic Bilbao when Llorente made his first appearance for the club in 2006. Valverde was impressed by Llorente's potential and gave him a number of opportunities to play for the first team. Llorente made the most of his opportunities and quickly became a key player for Athletic Bilbao.