Former Celtic striker Andy Walker has urged Ronny Deila to shake up his tactics by relaxing his emphasis on playing a lone striker.
Celtic failed to win three out of four matches without injured top goalscorer Leigh Griffiths and they needed the forward to come off the bench to snatch a late 1-0 win against Partick Thistle on Saturday.
Nadir Ciftci only has four goals since his summer move from Dundee United and Walker believes Deila should give him some support and return to the days when Celtic fans had pairings like Chris Sutton and Henrik Larsson to entertain them.
"He could shake it up a bit," Walker said. "Celtic are renowned for their striking partnerships down through the years.
"I think Nadir Ciftci, if Leigh Griffiths is injured, certainly needs a bit of help. He's not the type of striker who can play up front on his own.
"I think the supporters would like to see some flexibility from the manager in the way that he plays."
Walker also feels Celtic need to spend wisely during the transfer window, with the likes of Derk Boerrigter and Stefan Scepovic possibly set to move on.
"When you look at the amount of money Celtic spent getting the likes of Boerrigter and Scepovic in, that's the best part of £5million," said Walker.
"You expect to see a bit of evidence on the park that they are improving but those two players on the park have done absolutely nothing. Certainly the recruitment can improve."