Is the End in Sight?

So I watched Federer defeat Benjamin Becker of Germany in the 2nd round of the Madird Open. First impression? Federer still better than most, but not as efficient as in the past at putting foes away. To me, it did not appear that he would play defense full out, unless the score dictated. What is up? Getting bored with the non-Grand Slams? Only time will tell, in this case, the upcoming French Open, but I predict the end of his streak of 23 consecutive Grand Slam semi-finals or better.