Cardiff defender Mark Hudson admits former Bluebird Michael Chopra could be a "handful" when they host Ipswich in the Championship on Saturday.
Chopra scored 65 times in 162 Cardiff appearances during two Cardiff.
But amid Cardiff's summer clear-out, the striker, 28, joined Ipswich on a three-year deal and has scored four goals in 10 league starts.
"With him at the spearhead of the [Ipswich] attack we've got to watch out," said Cardiff captain Hudson.
Hudson added: "I was here two years with him and I do know him well and we know he's a threat so we do know we'll have to keep our eye out for him.
"But they're on a bit of a march now that they've picked up a couple of results and with him at the spearhead of the attack we've got to watch out for him.
"We know what he's about and trained with him for two years and we know he's going to be a handful, but they have 10 other players we've got to watch out for.
"We know his strengths, we know his weaknesses. Hopefully we can work on the weaknesses.
"We know he's a goal-scorer. He's proven that over his career. He's sharp, he's lively around the box.
"If you keep him out of the box, you limit his chances.
"He's one of those characters… he'll want to score, but we've got to stop him doing that."
Hudson believes the home fans will give Chopra a good reception on his return, but doubts former Swansea City striker Jason Scotland will receive similar treatment.
"I think he'll get a good reception," Hudson said of Chopra.
"He's been here twice and scored goals... and he's always done what he could to help the club go forward so I imagine he'll get a good reception.
"But it's obviously about us on the day, really.
"I'm not sure he'll [Scotland] get a good reception, but we'll go from there. They've got a good forward line.
"We know [Jay] Emanuel Thomas is there as well. So they've got some good forwards."