Stoffel Vandoorne has been shuffled to the back of the grid after Honda detected an MGU-H issue on his power unit on race day morning and opted to change it. Combined with the five-place penalty he already had for a new engine earlier in the weekend, Vandoorne has a 30-place drop -- moving him from 14th on the grid to last. For those keeping track of Honda updates, the power unit fitted to Vandoorne's car is version 3.8.

Laurence Edmondson, F1 Editor

The two fastest men in the world? Probably. Usain Bolt gets a taxi ride he'll never forget with Mercedes F1 driver Lewis Hamilton at the Circuit of the Americas. And Hamilton did not hold back!

Laurence Edmondson, F1 Editor

F1 has revealed what the re-jigged build up to the U.S. Grand Prix will look like later today. Michael Buffer has been heard testing the limits of his voice (and the COTA sound system) this weekend, while Bolt is due to arrive at the paddock on Sunday.

Nate Saunders, F1 Associate Editor

Another grid penalty issued by the stewards office. This time it's three places for Lance Stroll, who impeded Romain Grosjean in Q1. Stroll was being coached through a setting change by his engineer at the time, and although the stewards took that into consideration, they also noted that it was a very dangerous situation due to the 100km/h speed differential between the cars. Stroll also gets the first superlicence penalty point of his career.

Laurence Edmondson, F1 Editor

The competition between teams in F1 goes well beyond the track. A mechanical bull has been set up in the paddock along with a leaderboard of top times. Haas and Red Bull currently have some of the longest stints of the weekend, but there's no sign of title rivals Mercedes and Ferrari just yet.

Laurence Edmondson, F1 Editor

Another impressive effort from Fernando Alonso, dragging his car through Q3. The Spaniard gives one of his renowned bits of glowing self assessment -- "I don't think I could have done any better than that" -- as he returns to the pit lane. Alonso fans can be optimistic, at least, that next year making Q3 should be a formality for the Spaniard as McLaren makes the switch to Renault power.

Nate Saunders, F1 Associate Editor

Former Ferrari chief track engineer and driver academy head Luca Baldisserri will be Lance Stroll's race engineer on an interim basis, Williams has confirmed, while the Canadian's regular engineer, James Urwin, is on paternity leave. Baldisserri was head of the Ferrari junior programme when Stroll was a member between 2010 and 2015.

Nate Saunders, F1 Associate Editor

Daniil Kvyat is back in the paddock this weekend. The Russian seemed to be in good spirits and refreshed by his two-race break - even though it was a demotion. Though he didn't watch much of the two races he did miss, he joked that the coverage has at least convinced him he doesn't want to become a journalist any time soon.

Nate Saunders, F1 Associate Editor

Here's a look at Pirelli's ultra-soft tyres for the U.S. Grand Prix weekend. The printing on the sidewall is usually purple on this compound but as part of F1's efforts to raise breast cancer awareness, they've gone pink in Austin.

Laurence Edmondson, F1 Editor