Top seed and two-time finalist John Isner and second seed Kevin Anderson advanced to the final at the BB&T Atlanta Open on Saturday.
The big righty blasted 21 aces in a 6-4, 4-6, 7-6 (7-5) win over Aussie Lleyton Hewitt in the first semifinal match on Saturday.
Isner was a runner-up at this event in 2010 and 2011, losing to compatriot Mardy Fish both times.
South Africa's Anderson didn't have much problems with American Ryan Harrison as he took a 6-3, 7-6 (7-3) victory thanks to 14 aces.
Isner will be going for his seventh ATP title and second this year, while Anderson is shooting for his first of 2013 and third, overall.
The winner of this tournament will receive $98,700.