Here are the Vols' updated ATP Tour rankings as of Sept. 23, 2013. The Vols are listed by highest singles ranking first. The number in parenthesis denotes change from previous week.
Singles: 128 (-3)
Doubles: 160 (-3)
Note: Off last week ... Playing this week at the $50,000 Napa Challenger in California.
Singles: 217 (+15)
Doubles: 71 (+1)
Note: Working back up the rankings -- just seven from his career best -- after reaching the quarterfinals last week at the $125,000+H Kaohsiung Challenger in Taiwan ... Playing doubles this week at the $50,000 Napa Challenger.
Singles: 233 (-2)
Doubles: 127 (+14)
Note: Nearing the top 100 in doubles after winning the $75,000 Izmir Challenger in Turkey last week with Austin Krajicek. Ranking of 127 is a career best ... Playing this week at the $50,000 Napa Challenger in California.
Singles: 689 (-1)
Doubles: 507 (-24)
Note: Won another doubles title last week at the $10,000 Futures in Italy last week, this time with fellow Italian Manuel Mazzella ... Winner of three doubles titles this year ... Off this week.