Federer, who increased his grass-court winning streak to 43 matches, won by scores of 6-4, 6-0, and 6-2.
"Roger is the best I have ever played against, full stop," said Henman, who last year finished out of Top 20 for first time since 1996 and has fallen to No. 64 in the most recent world rankings. "It's so difficult to have any impact in any area of his game. His serve is so deceptive -- not the fastest, not the biggest, doesn't serve the most aces, but he sets the point up so well for the rest of his game."
Henman had his serve broken six times and Federer made only eight unforced errors.
Other winners were third-seeded Andy Roddick, No. 4 seed David Nalbandian and No. 6 Lleyton Hewitt.