Kevin Magnussen dominated the penultimate round of the Formula Renault 3.5 Series at Paul Ricard in France to stand on the brink of the title.
Magnussen, part of McLaren’s young driver scheme, secured both pole positions and stormed to victories in the two races.
But a technical infringement on his DAMS car meant that he was excluded from the results.
DAMS intends to appeal the disqualification.
Magnussen’s misfortune handed victory to Red Bull youngster Antonio Felix da Costa, for his third win of the season.
Magnussen bounced back and controlled the second race, meaning that he heads to the finale in Barcelona with a 43 point lead over fellow McLaren youngster Stoffel Vandoorne, with 50 points on offer across both races.
Vandoorne was promoted to second place following Magnussen’s disqualification in the first race but retired from Sunday’s event.
Nico Muller finished in second place in the second race, with da Costa in third, meaning that the Portuguese driver can no longer win the title.
However, Vandoorne’s retirement means that da Costa is just 11 points behind his Belgian rival.
Sauber’s prospective 2014 driver Sergey Sirotkin elected to skip the first two days of the event due to commitments with the Swiss team in Russia, where he demonstrated a C32 in Sochi.
Sirotkin returned to Paul Ricard for Sunday’s race but didn’t make the chequered flag.
The final round of the season takes place at the Circuit de Barcelona-Catalunya in three weeks’ time.