Australian teenagers Todd Reid and Adam Kennedy lost first round matches, leaving veteran Scott Draper as the only Australian left after day one of the AAPT tennis championships at Adelaide's Memorial Drive.

Reid, 18, the junior Wimbledon champion and regarded as one of the brightest young prospects in Australian tennis, won the first set against American eighth seed Vincent Spadea, before the vastly more experienced Spadea won 3-6 6-3 6-3.

Leading into the ATP season-opening tournament, Reid, who only turned professional midway through this year, was ranked 319th in the world, compared to Spadea's ranking of 67.

Kennedy, Reid and Draper were all handed wildcards into the 32-man main draw.

Kennedy, 19, and ranked 484th in the world, also failed to capitalise on a good start against a much more highly ranked opponent, with world No.102 American Brian Vahaly winning 4-6 6-2 6-0.

Spadea will meet Vahaly in the second round.

The last remaining Australian in the singles draw, Draper, will play big-serving Dutchman Richard Krajicek, who is on the comeback trail from a series of injuries, in a first-round match on Wednesday.

Another Australian, Jaymon Crabb, made it to the final round of qualifying, before being beaten 6-4 3-6 6-4 by Frenchman Richard Gasquet today.

In other first-round results, Romanian Adrian Voinea won a tight, rain-interrupted match with seventh seeded Belgian Olivier Rochus 6-1 4-6 7-6 (7-4).

Fifth seeded Argentine Mariano Zabaleta comfortably beat Germany's Alexander Waske 6-1 6-4 and United States player Alex Kim beat Hungarian Attila Savolt 2-6 6-3 6-3.

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