The Ghana international emerged hero of the day as his late goal handed Los Rojiblancos a 1-0 away win at Estadio Municipal de Riazor.
Three points have lifted Diego Simeone's men to third on the league table.
“It was a difficult match," Partey, voted Man of the Match, said.
"We knew how to suffer and defend well.
“In the end, we deserved the three points.
“We’re happy to have gotten the three points."
It has been a spectacular week for Partey, who by Saturday's strike, made it two goals in three days.
“I’m doing well and I’m happy with my hard work," he added.
“I’m going to keep fighting in order to be able to play more.”
In unarguably his best season at Atletico, Partey has made 10 league appearances, involving eight starts, this campaign.