Acropolis Rally leader Sebastien Loeb believes Saturday's stages of the Acropolis Rally will decide the event's winner, after a highly competitive day in Greece.
The world championship leader admitted the pace of the event so far could not continue through Saturday's roughest stages and that something would have to give.
So far after 115 miles of competition, nine stages and a 15-hour day on the season's toughest event, Loeb's Citroen and Jari-Matti Latvala's Ford Fiesta are separated by just 6.5 seconds.
"I'm not surprised at this gap today," said Loeb. "Nobody had the big problem, we know the Ford and Citroen are very fast and quite similar speed and we are four drivers in the car who are quite the same speed. All that means it was very close.
"Tomorrow is a hard day, though. At this speed, tomorrow I'm not sure that we can finish - I'm not sure the tyres will last until the end. I think tomorrow could be the day which decides who will win this rally."
Loeb's thoughts were echoed by Ford team principal Malcolm Wilson, who added: "I will be very surprised if we see all these guys back at the end of tomorrow if they keep pushing like they are.
"But what a fantastic day! I can't remember an Acropolis like this one - the first day, such a tough day, and they're split by the kind of gaps we see on Rally Finland."