The Italians go into the encounter at the Artemio Franchi stadium in buoyant mood following Sunday's come-from-behind 4-2 triumph over Juventus.
The Viola scored four goals in the space of 16 minutes to claim their first Serie A win against Juve in 15 years, with the result lifting Fiorentina to sixth in the standings.
"We haven't done anything yet but we certainly gave our fans and ourselves some joy," Pasqual said to www.acffiorentina.it.
"However, I don't think this win will make us over-confident.
"This team has proved that it has maturity and that we haven't failed many times the games that were important.
"We need to keep our concentration high. I hope I can keep my smile after Thursday evening."
Vincenzo Montella's side will be looking to remain perfect in Europe with victory against Pandurii.
Wins against Pacos Ferreira and at Dnipro have placed Fiorentina in control of their group.
The Viola have shown few signs of weaknesses, scoring five goals while conceding just one so far.
Fiorentina coach Vincenzo Montella is set to make changes to the squad that beat Juve.
Veteran midfielder Massimo Ambrosini will miss the encounter after sustaining a muscular injury against Juve that has ruled him out of action for two weeks.
Chilean midfielder David Pizarro must serve a one-match ban on Thursday while Montella is expected to rest the team's top scorer Giuseppe Rossi. Joaquin is set to lead Fiorentina's attack.
Rivals Pandurii clinched their first point in the group in their 1-1 draw at Pacos Ferreira last time out.
The Romanians are third in the pool, five points adrift of Fiorentina.
Marian Pleasca's men travel to Italy on the back of Sunday's 6-1 demolition of Botosani that lifted them to fourth in the Romanian First Division.