Inter Milan has had to accept the decisive setback in the master race of Italian series A.
The defending champion lost 1: 2 (1: 1) in a catch -up game at FC Bologna and is two points behind the city rival AC Milan in second place in four outstanding matches.
Ivan Perisic put the guests in the lead early (3rd), but Marko Arnautovic (28th) and Nicola Sansone (81st) turned the game with their goals.
Inter-goalkeeper Andrei Radu had a hard time in the second goal.
National player Robin Gosens was missing from Milan due to a muscle injury.