Last year's individual winner, Jürgen Melzer , was eliminated in the first round. This year, the Japanese Kei Nishikori won , who remained without a set loss during the entire tournament. He defeated the Spaniard Feliciano López 6-2 and 6-3 in the final . For Nishikori it was the second title in this category and his third title on the ATP Tour. The double won the year before Max Mirny and Daniel Nestor . Mirny played this year at the side of Horia Tecău and was eliminated in the first round, Nestor reached the semifinals together with Łukasz Kubot , in which they were subject to the American duo James Blake and Jack Sock . In the final , they had to admit defeat to their compatriots Bob and Mike Bryan by 1: 6 and 2: 6. For the Bryan brothers it was the third title this year and already the 85th career title on the ATP Tour.
The field of participants in the singles and doubles competition consisted of 32 players each.
Qualification for the US National Indoor Tennis Championships 2013 took place on February 16 and 17, 2013. Four places were played that allowed participation in the main draw of the tournament.
At the US National Indoor Tennis Championships 2013, the following prize money and world ranking points were paid out or credited for reaching the respective round. Players who first had to go through the qualification received the qualification points in addition to those for reaching the respective round (amounts otherwise not cumulative; amounts for the double competition per player).