Jenson Button admits there was nothing he could do during the closing stages of the British Grand Prix as he slipped to P13.
Having started Sunday's race at Silverstone in 10th place, Button appeared to be in the mix for a good haul of points after he found himself P6 following the deployment of the second Safety Car.
However, he went backwards after the restart as McLaren's decision not to pit their drivers for a third time when the Safety Car was still out backfired.
There was nothing the Briton could do as several drivers overtook him in the space of a few laps.
"When the Safety Car came out at the end, I had quite old tyres and was just a sitting duck," he said.
"I couldn't get any tyre temperature. That's one of our issues anyway and when you've got no tread you definitely can't get tyre temperature.
"I was just waiting for people to pass me. It was tough."
Button was the only driver in the top 10 to start on the harder tyre and he found it difficult to race on them.
"The first stint we went for the primes because nobody else in front was on them, but that was actually the one that grained - front and rear - for me so we had big problems in the first stint," he said.
"We just had to wait until a lap we could pit and put the other tyre on.
"I was much happier on that tyre - strong pace and no graining... work that one out..."