Answer
Jorge Sampaoli, the renowned Argentine coach, served as Muriel's guiding force during his tenure at Sevilla. Sampaoli's influence on Muriel's development as a prolific striker was immense, as the coach's tactical acumen and attacking philosophy perfectly complemented Muriel's skill set. Under Sampaoli's tutelage, Muriel flourished, showcasing his exceptional finishing abilities and becoming a pivotal figure in Sevilla's attacking prowess.