The loss sees Wolves remain in 11th place on the Premier League table.
"We started the game well, had good spells of football," Nuno said after the game.
"Disappointed, we were aware Burnley were strong (at crosses into the box) and could not hold on and be strong enough
"We were able to break the pressure, go out and have spaces, the ball was moving but then it became more difficult and they made it difficult for combinations. It is a tough, tough place. a good reaction but not a perfect game.
"Burnley drop and defended the box but we were not able to created much. We were passing the ball and staying still that is why it was difficult.
"All the players must keep the confidence, there is a long way to go but it was difficult game. The referee did not have the quality for a Premier League game, this is a problem we know we had Lee Mason before. It is not about the crucial mistake or decisions, it is about how he handles the game. The players get nervous, he whistles from the noises from the players. We are talking about the best competition but he does not have the quality to whistle the game.
"I just don't want to see him more, I told him him I hope he does not whistle a game of ours again. He cannot control the players, the players are constantly arguing. The other referees let the game flow."