It also depends if their buddies and in particular training partners stay in the tournament or not. And many players still have doubles to play after they lose in singles.
As previousely said, it depends on where and when is their next tournament. If they have a tournament the next week they will travel directly there, unless their home is near. If they don't play the next week they will usually fly home as soon as possible.
There's also a question of which surface they played in this tournament and which surface they play next, if it's a different surface they would like to get there as soon as possible and practice on that surface, but if it's the same it doesn't make a difference if they practice here or there.
Career high ranking: 6 (16/10/2005)
Current Ranking: 40, 789 pts, 35 tournaments
2007 race to the championship: 26, 293 pts, 8 tournaments
Year-end Ranking: 2006 - 46, 2005 - 8, 2004 - 63, 2003 - 146
Winner: 2006 - Beijing, 2005 - Sydney, Budapest, Hasselt
Runner-up: 2006 - Prague, 2005 - Hyderabad, Forest Hills, Los Angeles YEC
Semifinal: 2006 - Paris, Bogota, 2004 - Sopot
Quarterfinal: 2005 - Prague, Modena, 2004 - Indian Wells, Stockholm, Seoul, Filderstadt