Cerundolo raised his level when it mattered most to seal a 7-6(4), 6-2 win over Baez and joins his brother in the winners' circle with Juan Manuel winning in Cordoba last February but it is now the older brothers' time to shine.
En route to seeing off Baez, it was a tough run in throughout the week as he defeated Casper Ruud, Aslan Karatsev and Pablo Carreno Busta in the latter stages all barring the former in straight sets.
In sealing the final, a marathon 11th game proved vital in the opening set as Baez earned six break points but Cerundolo showed great resolve to hold.
He opened up a 4-0 lead in the first set tie-break before going on to clinch the opener and the momentum from there. Momentum that carried him to a 6-2 second set which saw him break twice and perform superbly behind serve before sealing it after just under two hours.