Robertson a fitness doubt for Luton - Riza

Cardiff City interim manager Omar Riza is waiting to see if Alex Robertson will be fit to return to the squad for Wednesday's game against Luton Town.

The midfielder missed the 2-1 win against Norwich City on Saturday with a hamstring injury.

"He had a slight ache in his hamstring, so it was a cautious one really," said Riza.

"We just need to manage him and see how he progresses before we make a decision on what happens on Wednesday."

Robertson joined Cardiff from Manchester City in the summer and has scored twice in 12 appearances this season.

The Australian international has developed into a key player for the Bluebirds and before he suffered the injury had started every game since Riza took charge.

Cardiff will look to extend their six-game unbeaten run when they face the Hatters.

Right-back Perry Ng is available again having being suspended for the game against Norwich.