RE: Federer: "No Need to Panic"
By the way, I did a bit of research and here's the main difference between 2012 and 2013.
2012 record: 71-12 (86%)
2013 record: 27-8 (77%)
Obviously a sizable difference. but where are those losses coming from? The main difference is vs. top 10 players. In 2012 Federer was 16-9 vs. top 10 players; in 2013 (so far) he's 1-5. Against other rankings groups his numbers are similar:
#11-20
2012: 8-1
2013: 5-1
#21-50
2012: 26-1
2013: 12-1
#51-100
2012: 18-1
2013: 2-0
#101+
2012: 6-0
2013: 7-1
So again, the main difference is against top 10 opponents. He's only beaten Tsonga way back at the Australian Open; since then he's lost to Nadal twice, Tsonga, Berdych, and Murray once each (he's yet to play Djokovic this year).
This is why I feel like his "true ranking" is more in the #5-10 range. Players in that range tend to have losing records against top 10 players but dominate everyone else. Compare (through Wimbledon 4R):
1. Novak Djokovic: 37-5 (7-3 vs. top 10)
2. Andy Murray: 31-5 (4-3 vs. top 10)
3. Roger Federer: 27-8 (1-5 vs. top 10)
4. David Ferrer: 41-11 (1-6 vs. top 10)
5. Rafael Nadal: 43-2 (12-1 vs. top 10)
6. Tomas Berdych: 35-12 (4-6 vs. top 10)
7. Jo-Wilfried Tsonga: 30-11 (4-4 vs. top 10)
8. Juan Martin Del Potro: 22-8 (2-2 vs. top 10)
9. Richard Gasquet: 32-11 (1-4 vs. top 10)
10: Stanislas Wawrinka: 34-12 (5-7 vs. top 10)
So there you have it. A couple things that stand out. First of all, Rafa's dominance - just amazing. 43-2 this year including 12-1 vs. top 10 players! OK, that's mainly clay but still. Secondly, Roger's record fits in with everyone not named Novak, Rafa, and Andy. In other words, so far we've had a Big Three and then everyone else.
To put all that another way, the only players other than Federer who have lost 2 or fewer matches to non-top 10 players are Djokovic, Nadal and Murray. Everyone else in the top 10 has lost 5 or more matches to players ranked outside of the top 10. In other words, he's been similarly as dominant to non-top 10 players as the other three, and moreso than other members of the top 10, but has struggled with other top 10 players - moreso than anyone other than David Ferrer.