Minardi's hopes for a strong result at today's US Grand Prix were dashed by technical gremlins over the 73-lap race.

Mark Webber and Alex Yoong started the race strongly from 18th and 20th places on the grid respectively, and were soon turning competitive lap times, especially considering the relatively heavy fuel loads dictated by the one-stop strategies both drivers had adopted.

Unfortunately, Webber was forced to retire from the event just before his scheduled pit stop when a problem developed with the power steering system on his car. An engine failure then saw Yoong coast to a smoky halt.

"I was happy with my performance today. The lap times were good, but it was also a bit frustrating because I knew from the beginning of the race that the engine wasn't as strong as it should be," the Malaysian commented.

"It was particularly obvious down the straights, as I was losing out to Mark, even though I was running less downforce than him. It was a shame when the engine went, because we've normally had great reliability from the Asiatech units this year.

"Nevertheless, I'm happy to have driven well today and enjoyed the race."

Webber was also disappointed. "It was going really well for us. We had a good first few laps and were particularly strong in the infield section of the track, but there was just no opportunity to overtake," he said.

"On the straight, the guys in front had slightly better top speed. Even so, we were having a strong race, but then a problem developed with the steering. It's a pity, but all we can do now is look forward to the final Grand Prix of the year, in Japan."

Paul Stoddart, Team Principal, added: "Despite a valiant effort by both drivers this afternoon, luck was not with the team. The power steering system problem on Mark's car, while not posing a danger, nonetheless prevented him from finishing the race.

"This was followed by an engine failure on Alex's car while he was driving possibly the best race of his career. He was definitely on course for a strong finish. Anyway, it's on to Japan, where the team will look to improve on its fortunes."