Speaking to the Official Club Website, Lewis said : "I would have come on against Wigan if there had been more time left but Kelvin dislocated his finger in the last seconds and there wasn't time to make a change."
"Obviously I am aware of the situation and that I might be called upon against West Ham but I haven't really thought about it and won't do until the need arises.
"I prepare for every match as though I am playing but I accept this could be slightly different from normal.
"The nerves will be there, I know. I get nervous before every game I play in really but once the match starts, they soon disappear. Anyway, if I do play against West Ham - at least it's a nice quiet game for my debut!"