"It was me who gave away the penalty I simply didn't think he would make it from there," admitted Jones. "Unfortunately, he did and I had to go into the dressing room afterwards and say sorry.
"Stade are seasoned performers in the Heineken Cup and they really did a job on us in the first half. We regrouped in the second half because it dawned on us that it was still all to play for.
"We are pretty disappointed not to have won the game and we need to carry on where we left off in the second half when we go to Sale next weekend."
Jones's region and country team mate Shane Williams said that the Ospreys paid for their poor start: "We were well up for the game and we wanted to start at one hundred miles an hour. We didn't, they did and they shocked us.
"The feeling was flat in the first half and we didn't play anything that resembled rugby. It took us until the second half to start playing and, in the end, we're disappointed not to have done."