Palmerton's Nate Andress advanced to the quarterfinals Monday at the District 11 Class 2A singles tournament. The senior defeated Pen Argyl's Brendan McMahon 6-1, 6-4 in the second round after topping Allentown Central Catholic's Andy Feng 6-0, 6-0 in his first match. Andress will play No. 3 seed Michael Swope of Palisades Wednesday in the quarters.