Valencia have confirmed that Manuel Llorente has resigned as president of the La Liga club.
Llorente, who will continue as a director, announced the decision at a board meeting today, reportedly in protest at boardroom changes at the club.
The club also confirmed Jose Antonio Garcia Moreno had resigned as vice-president.
"Today I informed the board of my resignation from the presidency of Valencia. I go with the conscience of a job well done," Llorente, who became president in June 2009, was quoted as telling a press conference.
Valencia lie sixth in the Primera Division table.
The 72-year-old takes charge of his final game on Saturday before making way for Derek McInnes, and the SPL clash with Dundee United at Tannadice is a must-win match for both teams.
Even then the winners need Kilmarnock to drop points at home to bottom club Dundee to ensure a top-six finish.
Brown said: "Normally it would be a very good fixture, the local derby, but it's now even more important because there could be something at stake.
"If Kenny Shiels' team does its job with a home victory it won't matter really, but it will matter for us from a point of view of pride and eventual league position so it's a good end to the season.
"It's not as good as we would have hoped but it's acceptable.
"We have to say Kilmarnock are favourites, then Dundee United with home advantage, then ourselves and Hibernian.
"It's a cup final. We've got to try and get a victory. We have to go and challenge them to defend because we're very good when we attack and United will know that."
When asked about the prospect of going out on a high with the help of former club Dundee, Brown said: "It would perhaps be a fairytale, but I think it's not out of the bounds of possibility.
"I thought at one point with the fixtures in front of me, that it was a possibility Kilmarnock could end up with two draws.
"If you were a betting man you would bet on Kilmarnock, but what we have to do is make sure that Aberdeen are the team that will be there if they slip up."
Brown took some time to look back on his reign, drawing satisfaction from stabilising the club after taking over in December 2010 when they were struggling near the foot of the table.
And he added that his major disappointments were losing to Hibernian in the William Hill Scottish Cup in the last two seasons.
"My major regret is that in the Scottish Cup semi-final we were beaten and I feel quite disappointed for the Aberdeen fans but also a bit angry that the inefficiency of an assistant ref cost a winning goal," he said.
"I didn't say that at the time but I thought it was quite apparent that (Garry) O'Connor was offside when he passed the ball to (Leigh) Griffiths.
"I'm not saying we would have won that game but we looked to be in the ascendancy and that was a big regret that that goal beat us.
"The goal that beat us at Easter Road this year was a good one but we missed a penalty and we should have had another one.
"So these are regrets, major ones, but you can't live in the past and be moping about it, you've got take it on the chin.
"Because I've had many pleasurable times to more than compensate for these disappointing times."
Brown insisted he had not had the time to reflect too much on the end of his managerial career.
"This is a 24-7 job," the former Scotland boss said. "It's next week I will feel the difference.
"If you ask me a week today, I would think there will be a void in my existence then, although I might be nipping off to the Masters next week.
"At the moment I don't feel anything in terms of sadness or emotion but there might be next week.
"I've not felt too much emotion but I've felt a contentment because the good will is quite exceptional.
"They (fans) have given us gifts and cards and lovely emails and messages and the only payback we can give them is if the team performs well at Tannadice and gets the required result."
