Napoli drew 2-2 with Paris Saint Germain in Group C of the Champions League on Wednesday night.
The Italian side led twice, courtesy of goals by Lorenzo Insigne and Dries Mertens, but were denied what would have been a monumental three points by Angel di Maria's brilliant last-gasp goal.
“We had almost won and are happy with the performance, but are angry and regretful at conceding at the 93rd minute," Ancelotti said, as reported by Football Italia.
Ancelotti continued: "Di Maria can create a shot into the far top corner at the last minute, that’s what happens when you have that much quality in the side.