Crosas said: "It is the manager's decision who plays, but I am working hard in training and I am ready to play.
"It has been a frustrating time. I had got myself into the team and had played several games in a row and was enjoying myself. It is not easy when you start at a club in a new country and to get an injury so early was difficult. But that is all behind me and I am looking to the future.
"I am too young - I will turn 21 tomorrow - to say I should be playing regularly in the first team. I am happy to wait for my opportunity. But I am training hard every day and if I get picked this weekend I will be ready."
Marc has no fears in making his comeback in a one-off winner takes all Cup tie as he started his professional career in games like this.
"I am used to playing in cup competitions in Spain. I made my debut for Barcelona in the Copa del Rey. I would enjoy the chance to play against Dundee. Cup games are usually fast and exciting.
"The manager has not spoken about the cup game yet or about Dundee and I don't know much about them, but I would relish the chance to play again."
Crosas also took time to comment on the differences between playing football in Scotland and plying his trade in Spain.
"Football here is different to what I have been used to in Spain and France, but it is still a high level. The pace is much faster here. The weather is cold, but it is cold in Spain also. It does not bother me at all."
Glad to hear it Marc. Also it is good to hear that you are fit and ready to help the Bhoys to four in a row.
Yours in Celtic