 While at Juventus, Porrini gained two international caps for Italy in 1993, under manager Arrigo Sacchi, appearing in two 1994 FIFA World Cup qualifying matches.He made his international debut in a 6–1 home win over Malta, in Palermo, on 24 March, and his second and final appearance with Italy came on 14 April, in a 2–0 home victory over Estonia, in Trieste.After his retirement, Porrini agreed to stay with Pizzighettone as youth coach for a season, then filling a similar role at Pergocrema.