Celtic are reliant on the Hoops striker for goals but Beattie thinks the Bhoys cannot allow themselves to be short of cover in case the Parkhead prodigy is sidelined.
Rangers are reportedly keen on bringing Lawrence Shankland to Ibrox - but face competition from Celtic.
Ibrox side Rangers go to Parkhead to face Old Firm rivals Celtic in Sunday's Scottish Premiership derby.
Craig Beattie spent four years in Celtic's senior setup after being released by Ibrox side Glasgow Rangers.
Leigh Griffiths scored for Brendan Rodgers’s Celtic against Rosenborg in the Europa League last week.
Former Celtic striker Craig Beattie played with Scott Sinclair at Swansea City.
Brendan Rodgers’s Celtic have signed Odsonne Edouard on a permanent contract from Paris Saint-Germain.
Celtic have strolled to the Scottish Premiership title and have generally dominated the domestic game.
Celtic face Glasgow Rangers in the Scottish Cup semi-final this weekend, and Beattie has suggested that it could be a tough game.
Brendan Rodgers was confirmed as the new Celtic boss on Friday.
Liverpool boss Jurgen Klopp may have to break the club's record transfer fee to bring in Kai Havertz from Bayer Leverkusen.
Tottenham Hotspur are reportedly interested in Philippe Coutinho.
Liverpool defender Dejan Lovren appears to be fourth choice central defender for Jurgen Klopp's side.
Sean Dyche's Burnley could maybe do with a new goal-scorer at Turf Moor with Watford's Andre Gray potentially set for a Premier League switch.
Jose Mourinho has pushed Tottenham Hotspur closer to the Champions League places.
Danny Rose joined Newcastle United on loan from Tottenham Hotspur in January.
Leeds United's woes continued with another defeat last night.
Arsenal academy product Emile Smith-Rowe is impressing in his loan spell at Huddersfield Town.
Tottenham Hotspur defender Danny Rose is currently on loan at Newcastle United.
Leeds United slumped to a fourth defeat in five games last night.