Hercules coach Esteban Vigo believes his side can upset all the odds and complete a Primera Liga double over table-topping Barcelona.
The reigning champions were undone 2-0 at the Camp Nou on matchday two as a brace from Nelson Valdez gave the newly-promoted side a famous victory.
Barca have not lost since, winning 18 and drawing one of their subsequent La Liga outings, but Vigo believes lightning can strike twice for his mid-table outfit.
"After hearing the debates, you would think we probably have no chance to do it, but I am convinced that it is not the case," he said. "If we are able to or not depends on many things, such as maintaining energy throughout 90 minutes, as we did at the Nou Camp."
Barca, meanwhile, are coming off the back of a 5-0 Copa del Rey semi-final win over Almeria.
Mallorca captain Jose Nunes insists transfer speculation cannot be allowed to derail his side ahead of their Primera Liga meeting with Sporting Gijon on Saturday.
A handful of the Mallorca side have been attracting interest from other teams since the window opened in January, with Fernando Cavenaghi, Pierre Webo and Gonzalo Castro the latest to be linked with moves before the end of the month.
Nunes accepts the speculation is inevitable but does not expect it to rock the boat.
"The rumours about moves should not affect the team, we are accustomed to it," he said. "These (transfer) dates are set and we are not the only team that goes through these situations.
"It is normal; some come, some go. When there are proposals is because we have quality players. I do not like anyone to leave, but we know it can happen here at any club."
Second-bottom Malaga host a Real Zaragoza side who sit just two points clear of the drop zone and Ignacio Camacho has called for the side to begin treating every home fixture as a must-win.
The 20-year-old former Atletico Madrid midfielder said: "From now on, all games are finals. The home games are the key as away games will be difficult.
"We must show we are a strong team and not let them play. They (Zaragoza) are a direct rival, so the three points are necessary to get confidence."
Bottom club Levante host Getafe at Ciutat de Valencia, with coach Luis Garcia admitting he has no idea whether or not his long-term future is with the club. That does not worry Garcia, though, as he remains entirely focused on the job in hand.
"I do not know [if I will be at Levante next season]," he said. "You never know where you will be. I am just thinking of a win against Getafe on Saturday and nothing else.
"I am very happy and comfortable here, as I have said all along, but football is about the present only. If I stay with Levante I am delighted, very happy, if not I will have to look elsewhere. The important thing is that the team comes first."
Real Sociedad play Almeria and Deportivo La Coruna host Sevilla in the remaining Saturday fixtures. Sunday sees second-placed Real Madrid visit Osasuna and Villarreal travel to Espanyol, while Atletico Madrid welcome Athletic Bilbao.