You will always have a chance in Cup if there isn't big invest (buying 5*, scout, done PT) from other higher level teams early or during season.
CUP system base on Quality not by your team level.
this happened the same to me last season, and i missed out the Cup by sleeping over, didn't change squad
this early season, I got draw in Cup level 9.. ouch and out so soon. I'm pretty sure next season even worse for me lol