The 2010 Legg Mason Tennis Classic was a tennis tournament played on outdoor hard courts.

It was the 42nd edition of this event and was part of the ATP World Tour 500 series of the 2010 ATP World Tour.

Unseeded David Nalbandian, who entered the main draw on a wildcard, won the singles title.

[3] List of Association of Tennis Professionals (ATP) singles entrants, as of July 26, 2010.

The following players received wildcards into the singles main draw The following players received entry from the qualifying draw: David Nalbandian defeated Marcos Baghdatis, 6–2, 7–6(7–4) Mardy Fish / Mark Knowles defeated Tomáš Berdych / Radek Štěpánek, 4–6, 7–6(9–7), [10–7]