Zinedine Zidane said he was "happy" to see Real Madrid reach the Copa del Rey last 16 after a 3-1 win at Unionistas de Salamanca on Wednesday. Gareth Bale netted the opener in the 18th minute, despite not having played since January 4, but picked up an ankle injury and had to be substituted. Unionistas levelled the tie at the start of the second half through Alvaro Romero, but Real's quality was too much for their opponents, with Juan Gongora scoring an own goal before Brahim Diaz's strike wrapped up the victory. "I'm happy with everyone," Frenchman Zidane told a press conference. "We knew what kind of game it would be on a really small pitch. But there was motivation as this is the Copa del Rey and we want to win it. "It was a difficult night and we struggled as we moved the ball around the pitch, which didn't help. We're happy to be in the last 16." Diaz had been linked with a move away from the Bernabeu, but Zidane declined to say whether the former Manchester City forward would be staying or leaving in the transfer window. On Diaz's performance, Zidane said: "I'm happy with what he did, with his goals. We're all here to do well and nothing more. "These matches don't change anything. Everyone knows their situation."