Jenkinson, a lifelong Arsenal fan, looked visibly shaken as he gathered his thoughts on a loss that puts Arsenal in serious danger of failing to finish inside the top four for the first time in 16 years.
"I'm distraught, to be honest," the right-back said.
"I know the importance [of the derby]. In history, we've always tended to come out on top but it wasn't our day. We beat them at home and they beat us at their place. But it's really disappointing that we haven't at least picked up a point."