After the Bulls fell to the Oklahoma City Thunder in overtime on Saturday night, coach Vinny Del Negro was far from impressed.

According to the Chicago Tribune, Del Negro labelled the Bulls' effort on the night as completely unacceptable.

"Their effort was just better in every way," Del Negro said. "Points in the paint, second-chance points, you name it, they just played harder than us. And that's not acceptable."

"Our guys have to guard better, all of them," he said. "They have to contain the ball better. No one had the energy we needed, not one person. We're definitely not good enough not to come in and work."