A last-minute Freddie Burns drop-goal secured a 15-12 win for Leicester.
The older Vunipola brother had no complaints about the result, saying: “We got what we deserved. The better team won.”
Sarries reached the final in their first season back in the Premiership following salary cap infringements. While they lost significant players, such as George Kruis, who retired with three conversions yesterday for the Barbarians against England, much of the squad’s core remained intact.
This season, though, the likes of player of the season Ben Earl and top try-scorer Max Malins have emerged as central figures, which Vunipola (left) believes will help.
“This is a new squad. Yes, there are a lot of old faces, but there are a lot of young boys becoming key players,” he said. “The young boys coming in will only get better. Us old boys have to keep playing well or we will be out the team.”