Manager Thiago Motta is deservedly earning plenty of praise for his Bologna side's steady rise up the standings, as their 2-0 win over AS Roma last weekend took them to fourth place, but behind the scenes, Sartori is the unsung hero.
The technical director is someone very familiar to Bologna's next opponents Atalanta and their manager Gian Piero Gasperini. Together Sartori and Gasperini took Atalanta from relegation strugglers to regular Champions League football.
At Atalanta, Sartori brought in Gasperini and they both took advantage of the club's excellent academy, as well as selling players for big money but always managing to replace them and improve the squad.
Sartori signed the likes of Robin Gosens, Ruslan Malinovskyi, Bryan Cristante, Duvan Zapata and Marten de Roon, providing Gasperini with the talent to take the club to new heights.
Before Atalanta, Sartori spent 12 years at Chievo, taking them from obscurity in the third tier to the dizzy heights of European football, discovering talents such as Andrea Barzagli, Simone Perrotta, Nicola Legrottaglie and Amauri.
In 2022, after parting ways with Atalanta, Sartori arrived at Bologna. After a poor start to last season, he brought in Motta as manager, and they rose from battling relegation to a ninth-place finish.
Now the pair look set to take the club even higher, with Sartori's signings of Lewis Ferguson, Joshua Zirkzee, Riccardo Calafiori, Remo Freuler and Sam Beukema impressing as Bologna continue their march up the table.
They have the third-best defensive record in Serie A behind Inter Milan and Juventus, conceding 12 goals in 16 games, and their seven drawn games mean they may not always win but they rarely lose, suffering just two defeats to date.
They held both Inter and Juventus to draws away from home and also drew with title holders Napoli, and the win over Roma was their sixth home victory in eight home games. Atalanta, two points behind in seventh place, face a stern test.
Motta defeated Jose Mourinho last weekend, having played under the Portuguese manager at Inter where they won the treble in 2010. Before that, he was part of Gasperini's Genoa side which finished fifth in Serie A.
"I know Thiago well, his team plays the way he played, he never made mistakes," Gasperini said after his side's 4-1 win over Salernitana on Monday.
"They are patient and make important plays. It will be a good test for me too, against a person I know well."
Bologna fans can hardly have expected their side to be a possible top-four side at Christmas, but they have done so thanks to Motta's aggressive and fluid football, and Sartori's ability to find new talent and replace those who move on.
Inter stretched their lead at the top over Juventus to four points last weekend and host 12th-placed Lecce on Saturday. Juve travel to face Frosinone, 13th in the standings, on the same day.
AC Milan, five points behind Juventus in third place and four ahead of Bologna, are away to bottom side Salernitana on Friday.
Roma welcome Napoli to the Stadio Olimpico on Saturday, with Mourinho's side slipping to eighth place, two points behind the champions.
