Paco Jemez admitted he was 'very satisfied' with his side, whilst Marcelo Bielsa refused to blame the officials for defeat.
Second half goals from Lass and Piti saw the Franjirrojos claim the three points that took them up to sixth position in the table.
And the 42-year-old Coach has conceded he was delighted with his men after they created history with the highest points total (31) for a Vallecano side at this point in the campaign.
“It is a record that they have earned,” he told a Press conference. “It is not easy to reach that number of points.
“I hope we can go on and make history at the end of the season.
“In the first half both sides tried to counteract each other, but in the second you could see we wanted it more.
“I am very satisfied with my players.”
Bielsa meanwhile admitted the officials were not the reason his team lost the game after the Franjirrojos converted a contentious penalty midway through the second half as it looked like Carlos Gurpegi tripped Alejandro Dominguez outside the area.
“Although the referee did not make the correct decision, he does not deserve condemnation from me,” Bielsa told a Press conference.
“We can't hold the officials responsible for the defeat because we had more than enough chances to win the game.
“It was business as usual from us,” he added. “So I don't really want to repeat myself.
“The difference between the two teams was in front of goal – we had twelve chances to score and converted one.
“They had three chances and scored two.”