Peterborough have drafted in West Brom loanee Callum Morton to bolster their attacking options, but the striker will miss the rest of January with a hamstring problem. Jonson Clarke-Harris was named on the bench for the FA Cup game against Bristol Rovers, but should return to the starting XI here. Idris Kanu is away on international duty with Sierra Leone at the Africa Cup of Nations. Centre-back Kyle McFadzean and experienced midfielder Liam Kelly both missed the FA Cup game against Derby with COVID-19 and could miss the trip to Peterborough. Left-back Ian Maatsen is back at Chelsea receiving treatment for a hamstring injury and will miss Saturday's clash.