Lukaku is out of the game against his parent club.
Long told Absolute Radioâ€™s Rock â€˜Nâ€™ Roll Football: "Yeah heâ€™s a big loss you know, he slotted into the team and last Saturday playing with the two of us front it felt really good together but weâ€™re lucky that we have different options to play with one or two up front and whatever the manager chooses you know weâ€™ll be used to it.
"Whether he just brings in Rosenburg or FortunÃ© or Odemwingie instead of Romer heâ€™ll change the formation totally. Weâ€™ll wait and see. Yeah Iâ€™m sure heâ€™ll have us really prepared to play against a good Chelsea team."