Jean-Eric Vergne was relegated to last of the runners on the lead lap of the 2013 United States Grand Prix after stewards deemed that he was at fault for a last lap clash with Esteban Gutierrez.

While initial views suggested that the Mexican had run hot into the back of the Toro Rosso, before being spat over the top of it and onto the grass, the officials saw things differently, and thought Vergne more at fault. The Frenchman said in Toro Rosso's post-race brief that he had used all his KERS in trying to catch team-mate Daniel Ricciardo, leaving himself vulnerable to attack from Gutierrez's Sauber, but blamed the rookie - who had already been docked ten places for blocking in qualifying -for clipping the rear wheel of the ST8 as he tried to pass.

The stewards, having received a report from the race director and examined video evidence, also heard from both drivers and team representatives, before deciding to hit Vergne with a retrospective drive-thru' penalty, the outcome of which added 20 seconds to his race time and moved him from twelfth on the road to 16th on the official result.

The race's other incident of note, the first lap clash between Pastor Maldonado and Adrian Sutil which left the German in the barriers with heavy damage to the front of his Force India, went unpunished, having not been brought to the attention of the stewards.

Charles Pic, meanwhile, received a drive-thru' during the race, having been found guilty of ignoring blue flags and hampering the progress of Lewis Hamilton.