U mean eliminated in the first week, right??
From the FAQ thread:
How to procede during challengers on a Grand Slam's second week?
If the player reaches a GS R16, they are out of qualifying; if they reach GS week 2, that means they are out of the challenger. These tournaments usually have a Tuesday start, so it's possible to play two qualifying rounds on Sunday & Monday. Players who are out of quallies can still be MD alternates or play doubles in these challengers if they don't reach the GS 2nd week.