Lewis Hamilton pits from the lead to over the rest of the field. It's a good stop from Mercedes, just 2.9 seconds, and he's back out in second. Nico Rosberg is told to push.

Shoddy stop from Williams with Felipe Massa getting held in his box. The Brazilian eventually gets away, but the delay means Daniel Ricciardo flies past to take third.

Image source, Reuters

"That has not gone at all to the Williams plan as Massa's tyre's must have hit the cliff on his in lap," says BBC F1's David Coulthard.

Julez, external: Hamilton is once again showing why he will be the world champion. Amazing driving!!!

Peter, external: Lewis just looks to be in supreme control of this race. Amazing stuff. How does he do it?

Shohidur, external: Excellent drive from Massa so far, not a million miles behind Rosberg. Really don't know what Bottas is doing.

Image source, Reuters

The Williams of Felipe Massa is showing good pace this afternoon. He's closing the gap to the Mercedes and is just 4.9 seconds behind Nico Rosberg.

Lewis Hamilton responds to Nico Rosberg's attack with a high 1m43 that is nearly half a second quicker than the German. The gap is now two seconds.

Lotus on Twitter, external: P10 for Pastor now! Stop the race, stop the race!

David Coulthard
BBC F1 co-commentator

"Up at the front Rosberg is keeping Hamilton honest - they are trading lap times."

Image source, Reuters

"OK Jenson, pit this lap," says Jenson Button's race engineer. A wound up 2009 world champion replies "Are you sure this lap? Are you sure?" in reference to the message from the previous lap.

Jenson Button is told to pit, but then told to stay out as his McLaren team-mate Kevin Magnussen is in the pits. Meanwhile, up front, Lewis Hamilton leads Nico Rosberg by 1.4 seconds. This race is not over yet.

Fernando Alonso continues his charge, passing the McLaren of Kevin Magnussen for sixth place.

Image source, AP

Libin Daniel, external: Hamilton! Hamilton! What a takeover! Takes a lot of guts. Austin! Make some noise!

John McEnerney, external: Two super moves by 2 super drivers Alonso & LH, imagine that battle week in week out! Super racing!

Jeremiah Kariuki, external: Lewis makes overtaking seem so easy! Superb drive. He only needs to keep the car ahead for the remaining over 30 laps!

Mercedes on Twitter, external: Phew!! They both emerge clean - strong stuff from @LewisHamilton! Your move @nico_rosberg! Let's have more of this!!

A Lotus passing a Red Bull? What is going on? Romain Grosjean passes Sebastian Vettel for ninth place. Vettel is have a torrid afternoon, complaining about the car's pace on team radio.

Lewis Hamilton has opened up a 1.3 second lead over Nico Rosberg, with Felipe Massa 6.9 seconds adrift.

Replays show Fernando Alonso finally gets past Jenson Button for seventh place.

James Allen
BBC Radio 5 live commentator

"It was exactly like this when Hamilton won here in 2012. He was shadowing Vettel [who was leading] and just before the end of the grand prix he passed him."

Image source, AFP

David Coulthard
BBC F1 co-commentator

"Rosberg goes wide into the corner and once again Hamilton came across the front of his car and left Rosberg with no choice but to drive off the circuit. In driver terms it's within the rules but it is a slap in the face to his team-mate.

"Rosberg decided to defend very late in the braking zone. He tried to make a move but you are not allowed in the braking zone."

Image source, Reuters

Lewis Hamilton leads the United States Grand Prix!

The Briton nips into his team-mate's slipstream and with the aid of DRS pulls alongside on the brakes in the run down to Turn 12. It's a bold move and Rosberg doesn't give him much space, but he's through!

Hamilton then gives Rosberg the squeeze on the exit, with the German forced on to the run-off before rejoining. What a blow that will be to Rosberg's confidence.

David Coulthard
BBC F1 co-commentator

"Hamilton is showing Rosberg he is there and filling his mirrors with a view of his car. Just applying the pressure.

"Rosberg just has to be a little bit on the side of cautious as he knows one little mistake will allow Hamilton to pounce."

Image source, Reuters

Lewis Hamilton is now in the DRS zone, just 0.8 seconds behind Nico Rosberg. Watch this space!

Force India's Sergio Perez, who attracts a lot of fans from his native nearby Mexico but retired on lap one: "I was trying to do the move into 15 and then Adrian (Sutil) closed the door. I tried to brake late but I couldn't avoid Kimi (Raikkonen).

"It is a shame. We were looking forward to the points and it is one of those races when you really didn't want anything to happen but unfortunately it happened in the most important race for me."

Image source, AP