Los Azulones have taken 10 points from the last 12 available to leave them just two points off fourth place, and with Malaga, Real Betis and Levante all not playing until later in the weekend, another victory over struggling Osasuna will take them into the Champions League places.
He told AS: "It is truly an exciting match. We are playing at four and when we finish at six, if we are capable of winning, then we will be in the Champions League places.
"We need to have our batteries charged to create a good atmosphere, because although it could be just for one day or some hours, to be in the Champions League is very nice and everyone ought to be very excited."
Garcia is wary of the threat of Osasuna, who were on a four-game unbeaten run until being defeated by Valencia last weekend.
"We are concentrating on Osasuna who are a difficult team despite being low down in the table," he said.
"It will be very difficult and we need to give our best to win. They are the team that has conceded the fourth least number of goals in the league, but also scored the second fewest. They defend very well, are very intense, press hard and their matches are very close."
Garcia rested a few players for the midweek defeat to Atletico Madrid in the Copa del Rey but is expected to resort to the starting line-up he has used in recent weeks in the league with the exception of David Abraham coming in for the suspended Alexis.
Osasuna boss Jose Luis Mendilibar is calling on his side to create more of a goal threat if they are to pull further away from the relegation zone.
He told the club's website: "We are not generating many chances and it is costing us. The games in which we have taking something are when we haven't conceded a goal.
"Starting from here we need to try and improve a lot in our goalscoring performance. It is not goals that we lack, but people arriving in the box."
Los Rojillos should though be boosted in their search for goals by the return of Kike Sola who missed both the league and cup encounters with Valencia over the past week with Joseba Llorente expected to make way.