The promotion recently confirmed the pairings on social media. UFC Fight Night 140 takes place at Parque Roca Arena in Buenos Aires, Argentina, on Nov. 17 and is headlined by a welterweight clash between Santiago Ponzinibbio and Neil Magny. The card will likely air on Fox Sports 1 following early prelims on UFC Fight Pass.
Pantoja was won for the third time in four Octagon appearances at UFC Fight Night 129, scoring a dominant unanimous verdict over Brandon Moreno on May 19. Sasaki, meanwhile, improved to 4-4 during his promotional tenure with a second-round submission of Jenel Lausa at UFC Fight Night 132 on June 23.
Aldana began his pro career with four straight victories before falling to Kenan Song in his Octagon debut at UFC Fight Night 132. Staropoli, a native of Buenos Aries, enters his first UFC foray with a 7-1 record that includes five wins by KO/TKO and two via submission.