Floyd Mayweather vs. Robert Guerrero staredown pic from weigh-ins in Las Vegas

The greatest pound-for-pound boxer on the planet, Floyd Mayweather, and the man who will challenge his undefeated record, Robert Guerrero, took to the scales in Las Vegas, Nevada, today (May 3, 2013) to weigh-in for their 147-pound welterweight championship showdown scheduled for tomorrow night at the MGM Grand Garden Arena in the same city.

For complete Mayweather vs. Guerrero weigh in results click here.

Both fighters hit their respective marks before getting in each other's faces for the customary staredown, which you can see above and, for good measure, you can see this one too.

Exciting stuff!

Daniel Ponce de Leon and Abner Mares also stared each other down in advance of their WBC featherweight championship battle:

Remember, too, MMAmania.com will deliver LIVE coverage of Mayweather vs. Guerrero tomorrow night (Sat., May 4, 2013), starting with the Showtime pay-per-view (PPV) broadcast at 10 p.m. ET.

See you then!