Stoke goalkeeper Asmir Begovic believes that former team mate Kenwyne Jones under-performs when he settles at a club.
Jones was on target on his Cardiff debut against Norwich on Saturday, netting the second goal as the Bluebirds fought from behind to take all three points in a 2-1 win.
The former Stoke man has found goals hard to come by recently and scored only three times last season and just once in the campaign before that.
Begovic believes that although the Trinidad & Tobago international does boast some impressive qualities, he often loses focus once the honeymoon period of joining a new club wears off.
Begovic said: "If he is motivated enough and he is up for the game, he has such great skill with both feet and can jump as high as anyone I have ever seen.
"The question of why he doesn't do it week in, week out is maybe one to ask Kenwyne. It's a shame, we loved him when we had him and when he first came to Stoke he was up for it and a fantastic player for us, but things went a little bit sour after that.
"Maybe when it's new, exciting and he is playing for his reputation within a new club he gets a bit comfortable. I guess it's an individual thing."