this is also quite an achievement!
btw has he ever lost in 1st round of GS?
Yes, he lost inthe first round of the French Open in 1999, 2002 and 2003 and also lost at the first round at Wimbledon in 1999, 2000 and 2002.
Interesting to see that he lost in the first round at FO 2003 just before his extraordinary period of dominance started.
I'm sure Federer will still continue to do very well at majors. It's just the SF streak that has been broken, in much the same way that his finals streak was broken after the loss to Djokovic at AO 2008.