Cardiff City boss Neil Warnock believes they paid for individual errors in defeat at Chelsea.
Cardiff took the lead before Chelsea went onto win 4-1, with Eden Hazard hitting a hat-trick.
Warnock lamented: "Yeah, he's [Hazard] not a bad player.
"From a neutral point of view it's great to watch him play like that. He was unplayable at times.
"Joe should've won the first tackle before Hazard went through for the first goal.
"Second goal I don't know how that's a foul from Bobby Reid and Victor's got to learn really.
"It's a learning curve really.
"The penalty I could see it was a penalty 15 yards before it happened.
"It's about learning and we have to learn quickly."