Pogačar 'very happy' with his form ahead of title defense at Il Lombardia next weekend.
Mas claims first one-day victory of career in second day of racing since hitting the podium at the Vuelta a España.
Italian ace claims third victory in home classic, beats back Sofia Bertizzolo and U.S. rider Veronica Ewers on the San Luca hilltop.
The Astana Team pro launched a massive push from behind in the final 1.5 kilometers, moving into winning position just outside the final 500 meters.
The 1.pro race, normally held in early October, will see fierce competition from a hungry, fit peloton.
The team was unable to replace the bikes ahead of Tuesday's race start in Bologna.