Roger Federer visits Ethiopia...

His opponent, Ethiopian teenager, Jirata Demksa, smiles and prays the Swiss is having an off day.

But Federer just pauses and, taking a deep breath, serves a blistering ace.

The 17-year-old, realizing he's beaten, simply shrugs.

"He's the best tennis player ever," he says. "I am just lucky we played ping-pong."

Jirata says he will never forget taking two points from Federer in an impromptu game of table tennis at a school the tennis ace funds in the poor country.

For Federer, this week's visit to Ethiopia was one that moved him to tears. More + images...

Don't miss:

1. Roger Federer plays for Haiti...
2. Tiger Woods, Roger Federer and ... Haiti.
3. Is Andre Agassi a liar and a fraud?
4. Roger Federer is also a fashion model!!!
5. Meet the Hyena-Man of Ethiopia...