Roddick, 28, has won at least one ATP World Tour singles titles in each of the last 11 years. He won earlier this year in Memphis. He has won 30 career ATP World Tour singles titles, including the 2003 US Open title. He won six tournaments in 2003, five in 2005.

A current player on the U.S. Davis Cup team, Isner is well known in tennis circles as the only player in the top 150 to attend college for four years, for being the second tallest player on tour (6’9") and for his fast rise on the ATP ranking.  He has one of the hardest serves among current pros and holds the record for the longest match ever played in tennis history.

Dolgopolov, 22, is known for his unorthodox, unpredictable style and a rapid-fire serve. The 5-11, 157-pounder from Kiev, Ukraine is currently ranked No. 21 in the South African Airways ATP rankings, after being as high as No. 20 earlier in the year.