Trojan pair fell to Duke duo in Tulsa today.
Trojan duo fought off four match points to move on in Tulsa.
Frye and Smith are in the main draw for singles and doubles
Prequalifying rounds start Oct. 5, qualifying Oct. 7 and main draw action runs Oct. 9-13.
Sandkaulen was the No. 1 seed heading into the tournament, while Rakotomalala did not earn a seed from the tournament.
Junior is the third straight Trojan to take the title at the event.