He is now behind Robert Shwartzman as he carves his way through the pack.
He is about three quarters of a second faster than Power but it's a lot of time to catch.
O'Ward hasn't given up but he is 10 laps down. It will take a miracle to win this.
He's back onto to track in 14th and behind Callum Ilott.
The pressure might be off his shoulders but Palou is stuck in traffic and sits in seventh. He will be losing crucial time to the cars in front and is 17 seconds behind Power.
Kirkwood is in a good position after a poor qualifying yesterday, he spoke earlier this weekend about his poor form in July. Earlier in the season he was the main contender against Palou for the championship.
Rahal pits from first and gives power back the lead followed by Lundgaard in second and Rosenqvist in third.
He reacts to Power who now is ahead of Rosenqvist on track putting himself in the aggregate lead.
McLaughlin pits for new softs. Power follows the lap after to protect from the undercut.
He leads from Palou who is on 32 lap old hards, none of the front three have pitted yet.
It seems strange the car hasn't been retired yet but O'Ward is now 8 laps behind.
Heartbreak for O'Ward but it was always going to be hard to turn the tide this late on.
Rosenqvist is passed DeFrancesco while O'Ward is rolled into pitlane.
O'Ward sounds like he has a problem. This might be the first retirement for the season. It will also hand the championship to Palou.
Will Power leads the pack away from green with a big gap between him and Palou. McLaughlin tries a move on Palou but its covered off.
Rosenqvist decided to go for a pair of scrub reds. It was predicted this race would be a red race meaning the red tyre would be mainly used.
O'Ward and Rosenqvist are in the pits while Power has decided to stay out.
In a tight battle at the back of the pack, Daly has a massive hit sliding out of Turn 10.
Rosenqvist follows O'Ward much better but can't get through.
A Caution is out of the spins but I imagine we'll get back to green quickly.
O'Ward leads us away again with a big gap between him and Rosenqvist. Louis Foster and Rinus VeeKay both spin out of Turn One but no big collisions out of the first corner.
Bit of a mistake from Ferrucci there who looked to play some wheelspin but paid a heavy price.
Lots of the cars at the back of the grid have pitted for a change of tyres. This includes Conor Daly and both Premas.
Santino Ferrucci has smacked the wall protecting pit lane on the main straight after losing the rear on the power.
Dixon tries to retake the place for Ericsson hplds on for now.