The format was modified for the 1909–10 season which was played in a league format. Nine clubs participated, playing each other both home and away. The split between Federal and Italian championship was not completely abolished, because, while unifying these tournaments, it was decided for the last time to assign two titles at the end of the season. In fact, FIGC established to proclaim as Federal Champions (now turned into the main title) the first-placed club in the general classification, while recognized as Italian Champions (now become the secondary title) would be the best placed club among the four "pure Italian teams", depending on the head-to-head matches. At the end of the season, Pro Vercelli and Inter finished joint-top, so a playoff was needed in order to assign the Federal title (the Italian one was won by Pro Vercelli). This season was the first victory for Internazionale, who defeated Pro Vercelli in the final by a score of 10–3. Even the Italian title won by Pro Vercelli was later forgotten.