Roberto Di Matteo is preparing for his first derby as coach of Schalke .
The former Chelsea manager knows what to expect when Roberto Di Matteo leads Roberto Di Matteo 's side out at the Westfalenstadion on Saturday .
Roberto Di Matteo is preparing for his first derby as coach of Schalke , but the former Chelsea manager knows what to expect when he leads his side out at the Westfalenstadion on Saturday .