After a stunning start to the season in which they won 10 of their opening 15 matches in all competitions, losing just once, Malaga have lost their way of late and in their last two home matches have been beaten by Rayo Vallecano and Real Sociedad.
That has seen Manuel Pellegrini's men drop out of the top four of La Liga and slip 15 points behind pacesetters Barcelona, and Joaquin is determined to see them get back on track on Saturday.
The former Spain international, who was rested in midweek as Malaga secured top spot in their Champions League group with a 2-2 draw away to Zenit St Petersburg, said: "It's important to take the three points on Saturday to get a victory after the two previous defeats at home and regain the confidence we had at the start of the season.
"After getting through to the last 16 first in the group we must now focus on the league, which is the most important thing right now.
"Valencia are an opponent who on paper look like they are going to be up there fighting with us this season."
Javier Saviola and Isco are among the others that will return to the starting line-up after being rested but there is still no place for Nacho Monreal who continues to be sidelined by a back problem.
Valencia also ensured their place in the Champions League last-16 on Tuesday with a 1-1 draw with Bayern Munich and defender Ricardo Costa is now keen to turn their European form into a prolonged run on the domestic front.
Los Che currently lie in eighth as a result of their dire away form having only taken two points from a possible 18 on the road so far this season.
Moreover, Mauricio Pellegrino's men will be weakened by the absence of top scorer Roberto Soldado and Victor Ruiz through suspension and Joao Pereira due to a thigh injury, but Costa insists they are still looking forward to the game.
He said: "We are desperate to play in Malaga and it doesn't matter whether we are playing them home or away. The results haven't helped us a lot but we have a positive run right now and although we have players missing, it is not an excuse for not doing well in Malaga.
"The important thing now is to fight for our principal objective which is the Champions League places. We are close, but we need to take care with Malaga because they have a great team.
"We are clear that we need to be stronger and more consistent in the league and not lose so many points away because at home we are doing very well."