James Blake, 31, is aware his prime days as a player are behind him. Thus, he wants to impart the knowledge he learned from stars such as Andre Agassi and Pete Sampras. (Pratik Shah/The Washington Times)

James Blake, 31, is aware his prime days as a player are behind him. Thus, he wants to impart the knowledge he learned from stars such as Andre Agassi and Pete Sampras. (Pratik Shah/The Washington Times)