Jenson Button has again insisted there was no need for Sebastian Vettel to attempt the overtaking move which ultimately led to both drivers failing to score in the Belgian Grand Prix.
Button was running second to team-mate Lewis Hamilton in the race with Vettel giving chase in third when the pair collided at the Bus Stop – with Vettel losing control of his Red Bull under braking and slamming into the side of Hamilton's McLaren.
Button was out on the spot while Vettel was forced to pit for repairs, and was then handed a drive-through penalty for causing the collision.
It meant both drivers lost ground in the title race and having had a few days to reflect on the incident, Button was still angered by the manner in which he was taken out of the race.
"My thoughts haven't really changed, to be honest,” he said. “At the time, I was pretty confused by what Sebastian did. Now, I still think what he did was completely unnecessary – he didn't need to pass me at that point, and I wasn't making his life difficult, so his car shouldn't have been on such a knife-edge when he hit me.
"What's most frustrating is that I've lost out on a good handful of championship points at a time when neither Sebastian or Fernando were able to score. I know there are 150 points still up for grabs, but it doesn't help to now be 35 points behind Lewis.
"On a more positive note, under the old points system, that would still only be about 15 points, so anything is still possible. But at this point in the season, you've got to take every point you can – and the incident in Spa certainly didn't help."
Having denied claims from Christian Horner that he had braked earlier than normal into the corner, Button went on to add that victory for Hamilton in the Spa race came at the right moment for McLaren after a tough weekend in Hungary prior to the summer break and said the team was now focused on a full-on battle through the rest of the year.
"We were very pleased with our performance,” he said. “We were on the pace for the whole weekend, and we had one of the fastest cars – probably the fastest car in mixed conditions, so that's all very positive.
"While Spa wasn't a personal highlight for me, I think Lewis' win came at exactly the right time for the whole team – Hungary was probably the low point of our season, so to be able to bounce back so strongly will have given the team the assurance that we're headed in the right direction for the rest of the championship.
"We know it won't be easy, and that some circuits won't favour our car as much as Spa, but we're heading into the final six races in full-on battle mode. We know how to win and we want to keep winning."