Runaway GP2 championship leader Stoffel Vandoorne says there is no guarantee he will be on the Formula 1 grid in 2016, even if he clinches the junior series crown.
Vandoorne has dominated the first half of this year's GP2 Series and has a 65 point lead over nearest rival Alexander Rossi.
Vandoorne is part of McLaren's young driver scheme and sampled the MP4-30 at the post-race test in Austria last month.
"It's always been a very competitive sport, everybody knows that," he commented.
"There have always been drivers that have done well and haven't got to Formula 1.
"We know it's still similar at the moment, and even if I win the championship there is no guarantee that I will be in Formula 1 next year.
"I'm certainly trying my best and pushing really hard for it and really hope to be there next year."
If he is to secure a seat alongside Fernando Alonso at McLaren, Vandoorne faces competition from incumbent Jenson Button and test and reserve driver Kevin Magnussen, who raced for the team in 2014.