Mario Corso, nicknamed Mariolino (born August 25, 1941 in Verona), is an Italian former football player and coach. He was a famed left winger, who was notable for his consistency, intelligence, pace, and stamina. He was also renowned for his accurate distribution, crossing ability, and wide passing range, which made him an effective playmaker, as well as his outstanding technique, close control, and dribbling ability. He was also an accurate free-kick taker. His nicknames included "Mandrake" and "God's Left Foot" due to his beautiful free kick technique and crossing ability. Corso is mostly remembered for his highly successful club career at Inter. He has also represented the Italy national football team on 23 occasions. He later served as a coach for Internazionale and other teams, winning the B group of the 1987–88 Serie C2 campaign with Mantova.
Corso was an important player of Internazionale, the team with which he played almost exclusively throughout his entire career, from 1957 to 1973, winning four Serie A titles, two European Champions and two Intercontinental Cups, also reaching another European Cup final, and a Coppa Italia final. Corso made his Inter debut at the age of 16, in a Coppa Italia match against Como, which Inter won 3–0; on his debut, Corso scored the second goal of the match, becoming the youngest ever goalscorer in Inter's history. On the 23rd of November 1957, he also made his Serie A debut, in a 5–1 win against Sampdoria, soon becoming a permanent member of the starting eleven, and later serving as captain of the squad. Corso had a role on the left wing in Helenio Herrera's Inter Milan team of the 1960s, which is known as La Grande Inter, winning consecutive Serie A, European Cup, and Intercontinental Cup titles. Following his time with Inter, Corso briefly moved to Genoa in 1973, remaining there for two seasons before retiring in 1975. In total, he played 436 matches with 78 goals in Serie A.
In total, he made 23 appearances for the Italian national side over ten years, scoring four goals, although he was never elected to take part in a major international tournament with Italy. Corso made his debut in 1961, in a 3–2 home loss against England in an international friendly match. On the 15th October 1961, he scored his first goals for Italy, scoring two goals against Israel in a 1962 FIFA World Cup qualifying match, which Italy won 4–2 away from home. He also scored a goal in the return leg on 4 November, in Turin. Following an argument with manager Edmondo Fabbri, he was left out of Italy's 1962 FIFA World Cup squad, which was eliminated in the first round of the tournament. He returned to the stating line-up in 1964, and on 10 May, he scored his final goal for Italy in a 3–1 victory against Switzerland. He would also later be excluded from Italy's squad in their similarly disappointing 1966 FIFA World Cup campaign, as well as Italy's victorious UEFA Euro 1968 squad, which won the tournament on home soil. He was once again excluded from the Italian side that would reach the final of the 1970 FIFA World Cup. Corso made his final appearance for Italy on 9 October 1971, in a 3–0 victory against Sweden. Along with Giuliano Sarti, Armando Picchi, Gianfranco Bedin, and Antonio Angelillo, he is one of the most successful Italian, Inter club players to have never been called up for a World Cup. Despite his exclusion from the national side, in 1967 FIFA placed him in their All-Star team for an international friendly against Spain, in honour of goalkeeper Ricardo Zamora, winning the match 3–0.