ANNECY, France — Lance Armstrong finds himself in unfamiliar territory at this Tour de France — fighting just to remain among the top three riders.

Accustomed to dominating his way to victory, the seven-time Tour winner had to settle for a 16th-place finish in yesterday's time trial and a tenuous grip on third place.

The 37-year-old Texan battled fatigue in the 18th stage, a 25.2-mile race against the clock around bucolic Lake Annecy that Alberto Contador won in 48 minutes, 31 seconds to close in on the overall victory.

Armstrong was 1:30 behind, but he entered the day in fourth and easily overcame a 30-second deficit to Frank Schleck. The Saxo Bank rider finished 2:34 behind Contador to slip from third to sixth overall, but is only 34 seconds behind Armstrong.

After yesterday's stage, Armstrong said he had "mixed emotions. Sixteenth in a time trial is not a good result, but my ambition is to get on the podium, so I have to be happy with that."

During his reign as Tour champion, he never finished lower than third in a time trial, except once, when he placed seventh in one in 2003. This year, in the Stage 1 time trial, Armstrong was 10th.

Armstrong is admittedly not at his best this year, and is already holding out hope for a better performance in 2010. He announced yesterday that he is forming a new team that will be sponsored by electronics vendor Radio Shack. His current team, Astana, has had financial woes, and he's had testy ties with its Kazakh owners.

"I suffered," Armstrong said of the time trial. "I probably started too hard and maybe I was just empty from yesterday and those cramps I suffered at the end of the (17th) stage."

Andy Schleck retained second by finishing 21st — 1:45 behind Contador and only 15 seconds slower than Armstrong, who trails by 1:14 for second overall.