Bassong accused Nasri of cheating for the first of his two penalties.
He raged: "He went down too easily, I didn't think it was a penalty.
"He told me afterwards that I barely touched him.
"It leaves a bad taste in my mouth. I touched Nasri's chest but I did not grab him. I have seen the video and from my point of view it was not a penalty."
But Bassong had no complaints about the second penalty. He added: "I think the one Steve gave away was a penalty. After the third the game was nearly over. Because of the penalties we could not get back in the game."