( CNN ) -- AC Milan manager Massimiliano Allegri is under increasing pressure following his side 's third consecutive Serie A defeat . Allegri , who has been forced to defend his side 's wretched run of form , was left facing criticism once again after Udinese inflicted a 2-1 defeat on the Rossoneri . Milan , who also had Cristian Zapata and Kevin Price- Boateng dismissed , fell behind to a Mathias Ranegie goal just before the interval . Stephan El-Shaarawy fired home an equalizer from 25-yards before both Zapata and Prince-Boateng were dismissed . Antonio Di Natale converted a penalty to earn Udinese their first league win of the season and leave Allegri fearing for his job . Milan has won just one league game so far this season following defeats against Atalanta and Sampdoria . It was a bad day for AC 's city rivals Inter after it slumped to an embarrassing 2-0 defeat against Siena at the San Siro . Siena , who arrived in Milan bottom of the table , took a 73rd minute lead through Simone Vergassola before Francesco Valiani sealed the win . Sampdoria dropped their first points of the season after being held to a 1-1 draw by Torino at the Stadio Luigi Ferarris . Rolando Bianchi put Torino ahead from the penalty spot before Nicola Pozzi also netted from 12-yards to secure a point . Gian Piero Gaseperini suffered defeat in his first game as manager of Palermo after Atalanta recorded a 1-0 win . The former Inter boss was unable to inspire Palermo to its first victory of the season as Cristian Raimondi 's goal gave Atalanta all three points . The game between Cagliari and Roma was called off after the president of the Sardinian club rejected local authority orders to exclude fans from their new stadium . In the day 's late game , Lazio surrendered its unbeaten league record after suffering a 1-0 home defeat against Genoa .
Pressure on Inter after nightmare start to campaign . Inter Milan have lost three of their four league games . Inter suffer embarrassing home defeat against Siena . Milan earn first win of the season with draw .