It was the 45th edition (for the men) and the 3rd edition (for the women) of the event known that year as the Citi Open (previously known on the men's tour as the Legg Mason Tennis Classic), and was part of the ATP World Tour 500 series of the 2013 ATP World Tour, and of the WTA International tournaments of the 2013 WTA Tour.
2013 ATP Challenger Tour | 2013 | Australian Open | French Open | 2013 ATP World Tour | Open University | open source | 2013 Southeast Asian Games | 2013 ITF Women's Circuit | U.S. Open | 2013 WTA Tour | 2013 Island Games | Wacken Open Air | Eurovision Song Contest 2013 | The Open Championship | 2013 Mediterranean Games | U.S. Open (tennis) | Big East Conference (1979–2013) | 2013 World Aquatics Championships | 2013–14 figure skating season | All England Open Badminton Championships | U.S. Open (golf) | Open Source | Open-pit mining | Miss Universe 2013 | Malaysian general election, 2013 | Australian federal election, 2013 | 2006 Australian Open | Open Software Foundation | Indira Gandhi National Open University |