Frank McAvennie questions Deila's reported second attempt to sign Aston Villa's Libor Kozak

Frank McAvennie isn't sure why Celtic are pursuing Libor Kozak again.

Celtic legend Frank McAvennie has told The Scottish Sun that isn't convinced by the Bhoys' attempts to sign Aston Villa hitman Libor Kozak.

The Bhoys overhauled their striking options over the summer, as John Guidetti's loan deal expired, with Nadir Ciftci coming in as his replacement having thrived with Dundee United.

On deadline day, Stefan Scepovic left the club for a loan deal with Spanish side Getafe, and Carlton Cole joined as a free agent back in October.

However, manager Ronny Deila may still look for more firepower during the January transfer window, with a familiar target wanted again.

The Scottish Sun report that Celtic are making a renewed bid to sign Aston Villa's beanpole striker Libor Kozak in January, despite seeing the Czech Republic international turn down a move to Celtic Park over the summer.

The 26-year-old target man has struggled for fitness at Villa since signing from Lazio back in 2013, but he has been firing on all cylinders for Villa's Under-21 side this season with another two goals against Derby County on Monday.

There are plenty of question marks over Kozak, and Celtic legend Frank McAvennie - who hit 37 goals in 85 games for the Bhoys in two separate spells - has told The Scottish Sun that he isn't convinced as to why Deila is so keen to bring Kozak to Celtic Park, but hopes that a move to Glasgow would reinvigorate his career.

"I don’t know too much about Kozak," said McAvennie. "On one hand, you could say that if can’t get into Villa’s first team he won’t be much use at Celtic. But maybe he just needs a fresh challenge and perhaps coming up to Celtic in January or next summer could be that challenge," he added.

Register for ASTON VILLA team updates

Register for HITC Sport - Daily Dispatch