The Spanish full-back, who joined Germany on a permanent deal during the summer, immediately became a key figure for Leverkusen: last weekend he scored a goal and provided an assist against Leipzig.
Napoli have been handed a significant injury boost as Scott McTominay has officially returned to the club's training facilities to begin his rehabilitation program. The Scotland international has been sidelined recently following a medical procedure to correct a heart issue that left fans concerned about his long-term availability.