The Hoops have conceded seven goals in five games in the league so far.
The 33-year-old has not featured in any of the Scottish Premiership side's last four games.
Scott Sinclair joined Celtic from Aston Villa in the summer transfer window.
The 22-year-old came close to leaving the Scottish Premiership side during the summer window.
The Scottish champions head to the Nou Camp on Tuesday.
The assistant manager is insistent there will be no complacency against Hapoel Be'er Sheva.
A select round-up of the latest news involving Mark Warburton's Glasgow Rangers and Brendan Rodgers' Hoops.
Celtic have a big week ahead of them as they look to secure a return to the Champions League.
Celtic are set to play the first leg of their tie against Astana tomorrow.
Celtic have reportedly had four bids rejected for Aston Villa forward Scott Sinclair.