CLICK HERE for full Mexican Grand Prix FP1 results
Max Verstappen had the honour of controversially topping the first F1 free practice session to take place at the Autodromo Hermanos Rodriguez in 23 years as slippery conditions and braking issues defined the Mexican Grand Prix opener.
The first motorsport action seen at the Mexico City circuit for several years, the circuit was expected to be lacking in grip even before light rain earlier in the morning made conditions particularly treacherous during the initial stages.
Indeed, with drivers struggling to find grip around an unknown layout, even on intermediate tyres, several would experience off-track moments, but times would steadily come down as the session progressed.
However, as they did it was Verstappen that would be classified as quickest despite seemingly having cut turn 11 en route, the Toro Rosso forced to take the line after getting out of shape around the Esses.
Despite this, the Dutchman's 1min 25.990secs stood at the end of the session, leading a Renault-powered 1-2, with Daniil Kvyat second. Indeed, it was a strong session for the Renault-powered cars, the tight infield of the circuit helping to negate its speed disadvantage down the 1.2km home straight.
With times improving to the end, Kimi Raikkonen and Sebastian Vettel ascended to third and fourth for Ferrari, ahead of Daniel Ricciardo and Nico Rosberg, the German making it back on track late on despite his brakes dramatically catching fire when he out-braked himself into turn 12 at the start of the stadium.
Though Rosberg's issues were certainly more dramatic, they were symptomatic of the problems being felt across the field, with several teams reporting heightened temperatures due to cooling conditions brought about by the unusually high altitude.
One of several drivers to spin, along with Felipe Nasr, Sergio Perez and Ricciardo, Valtteri Bottas recovered to set the seventh fastest time in the best of the Williams', ahead of Carlos Sainz, home hero Perez and Felipe Massa.
New champion Lewis Hamilton, meanwhile, could only manage a moderate 11th fastest, ahead of Marcus Ericsson, Pastor Maldonado and Nasr.
Jenson Button, meanwhile, managed just nine laps in the McLaren Honda ahead of what is set to be a tough weekend of the team having opted to take engine change penalties.