He was noticed by Luciano Moggi in Serie C1 in 1989, he signed for Napoli in Serie A for ₤2 million, making his debut that year. The young and talented Zola scored two goals as understudy to Diego Maradona as Napoli won the Serie A title in 1990, the only league title of Zola's career. Zola scored his first goal against Atalanta, whilst his second goal was scored against Genoa, during injury time, which allowed Napoli to win 2–1 and maintain a two-point lead over Milan, who were Napoli's main title contenders, in second place. Zola was excited by the transfer, and he developed an important friendship with Maradona, who commented "Finally they have bought someone shorter than me!" Maradona would prove to be a big influence on Zola's career. The two would spend hours practising free kicks together after training and Zola later said that "I learned everything from Diego. I used to spy on him every time he trained and learned how to curl a free-kick just like him."