The Mountaineers (9-5, 3-1 SoCon) have now won five of their last six matches, while Elon (7-10, 4-2 SoCon) suffers its first home SoCon loss in 15 matches.
In doubles, Appalachian's No. 3 pair of senior Steve Karendal and junior Andrew McKinnon fell behind early but rallied to win five of the next six games to pick up an 8-5 win. The Phoenix responded as Elon's top doubles pair took an 8-3 decision at No. 1 doubles.
In singles action, sophomore Matt Saltsgaver made quick work of his No. 6 match, winning 6-1, 6-1. Karendal soon followed with his 6-1, 6-2 rout on the No. 5 court, putting the Apps up 3-0 and within one team point of winning the match.
Humblet came through with the match-clinching point in his match at No. 3 singles, shutting out his Elon opponent in the second set for a 6-4, 6-0 win.
Elon notched its first team point with a win in the No. 4 slot, as Jordan Kaufman stole a 6-2, 6-3 victory for the Phoenix.
Mountaineer Philip Kloc survived a hard-fought first set and broke serve in the second set to take the No. 2 match, 7-6(7-3), 6-4.
In the final match on the court, Markov hung tight with his Elon opponent, but Cameron Silverman triumphed, 7-5, 7-6(7-5) to close the day with a second point for the Phoenix.
On Thursday, the Mountaineers return to Boone to host The Citadel in their first outdoor match on their home courts. Action kicks off at 2 p.m. at the ASU Tennis Courts.