The France international, who moved to St James' Park on a season-long loan from QPR during the summer, netted the Magpies' second goal as they attempted to mount a fightback after conceding three times in the first 37 minutes.
|8/1||Newcastle are 8/1 with Paddy Power to beat Cardiff 1-0
"It was a long journey last night for them," he told the Newcastle Chronicle. "The group is disappointed as much as them but the fans still supported us all the game.
"We heard them a lot in the second half. They continued to support the team. I'm sure we'll do better at Cardiff for them.
"The difference between the first half and the second half was like night and day. The gaffer changed two players, and there was a big difference between the two halves.
"We could have done better for the goals. It's difficult when you concede three goals. After that, we scored two goals, but it wasn't enough. We were all disappointed. In future we have to do better."