Valencia coach Gary Neville says he is confident he can turn things around at the La Liga club, while denying that recent days have been the worst experiences of his football career.
Neville's team have not won any of his eight La Liga games in charge, and their good Copa del Rey run ended with Wednesday's 7-0 hammering at Barcelona in the semifinal first leg.
Sunday evening's game sees Los Che visit Real Betis, who themselves are in awful form, having not won any of their last 12 games across all competitions.
The former Manchester United defender told his pregame news conference that he was confident that "very quickly" the work he and his players were doing would bring results.
"As a coach you have to think about doing the right work, working as hard as you can and thinking about the fact that eventually this will turn," Neville said. "I believe it will turn very quickly. I've always believed that, and my belief won't waver.
"I know my work, and the work of the players, is very good. We've had enough of the suffering, not winning matches, now it's about working harder, that's how you turn it around."
On arrival back from Barcelona at Valencia's training ground in the early hours of Thursday morning, the squad were met by around 200 fans angry at one of the worst results in their club's history.
Neville said he had been impressed by the passion shown by these supporters, which he felt could be turned into a positive.
"I'm a strange type of person in that I was driving on that bus coming down the road, we could see the fans as we entered the training ground," he said. "All I could think was wow, I've not seen fans as passionate as that in my football career.
"My message to the players Thursday morning was imagine how passionate these fans will be when it's good. Maybe I'm the only person who can take an incredible positive out of a negative like that. But when I see the veins appearing in the fans' faces, the anger, the fight, I can only imagine that same in reverse, when it's good.
"Our challenge is to make them love us again."
The former England international said he was still enjoying life in Spain, despite some very severe criticism from former players and local media, but knew he now need to use all his experience and start to deliver.
"I've had many people contact me in the last few days to ask me how I am," Neville said. "I tell them [this is] an exhilarating experience, fantastic time. From my point of view, I look on this time as one that will make me stronger, make the team stronger, make the club stronger.
"I don't see this as the worst experience of my football career -- I lost in Champions League semifinals, I lost titles on the last day of the season, lost in FA Cup finals. We lost numerous times with England in tournaments. These were incredibly hard experiences, but they make you tougher and stronger.
"Now is when Gary Neville needs to deliver. Gary Neville needs to use all the experiences he has had. My back is against the wall. It is time for me to prove now that I can deliver."
Neville said he was confident that hard work done on the training ground, and perhaps a change of fortune, would see his team starting to get the results their performances deserved.
"There can be no excuses," he said. "We have to win games. In the 10 days up to last Sunday I could see a team developing, a structure. In the last two or three days we have to remind ourselves of the fact we deserved to win 3-0 or 4-0 against Sporting Gijon last weekend.
"The only way we can look at Wednesday night is as an accident. We cannot dwell on that, as painful as it was. I will take criticism and responsibility for what happened on Wednesday night, as the coach. But my players are trying their absolute very best.
"Tomorrow we go out to fight for the shirt again, to show not just we can produce better performances, but get results, maybe with just that little bit of luck going our way."