Federer does not lag.

Roger Federer (No.1) quickly validated his ticket to the quarterfinals in Halle against the Colombian Alejandro Falla (6-1, 6-2). The German Mischa Zverev managed a performance by eliminating Jürgen Melzer (AUT/N.6), 3-6, 7-6, 7-6.
Halle ATP - Round 2:
Roger Federer (SUI/N.1) beat Alejandro Falla (COL) 6-1, 6-2
Next opponent: Kohlschreiber (GER)

Philipp Kohlschreiber (GER) beat Marco Chiudinelli (SUI) 6-4, 7-5
Next opponent: Federer (SUI/N.1)

Mischa Zverev (GER) beat Jurgen Melzer (AUT/N.6) 3-6, 7-6 (7/2), 7-6 (7/3)
Next opponent: Becker (GER) or Davydenko (RUS)