You won't get any points for the city player if that's what you're thinking. Sorry, I don't know whether you're new to the game or not, so here goes....There are transfer deadlines for each gameweek (usually saturday 11.30am). Any transfers (and lineups) made after the deadline do not count for that gameweek. They come in effect for the following gameweek.
So if you buy a player today (Robinho or someone) he will get you 0 points because the deadline has passed. He won't be in the lineup either. However, he will be available for the next gameweek
Modric has a knee injury so probably out for a few weeks at a wild guess..