Susannah Scaroni’s time clocks in at 1 hour 41 minutes and 45 seconds, a full five minutes ahead of the rest of the field.

Very impressive.

Susannah Scaroni wins the Women’s Wheelchair race!

Another fairly dominant performance. Scaroni took the early lead and managed to, not only hold on, but extend her lead all the way through the race until the finish line.

Scaroni has previously won the New York and Chicago marathon’s and now adds Boston to her collection.

The women’s elite race has seen the leading pack cut down to eight runners. Hellen Obiri of Kenya is in the mix but Amane Beriso still leads the way.

The men’s elite runners went through 20km in 59:01 and are close to the halfway mark now. The front half of the Boston Marathon is the easier one to run so expect the final finishing time to be slightly over two hours.

In the women’s elite race Emma Bates has started to fall off the pace that Amane Beriso, who owns the third-fastest marathon time ever, is setting.

It’s been effective push from the Ethiopian as they approach mile nine.

After a conservative opening 10km - ran over 34:48 minutes with 21 women in lead pack - Ethiopia’s Amane Beriso has made a move and totally strung out the pack in the women’s race.

They’re racing single-file now with Beriso at the front.

Eliud Kipchoge is totally setting the pace for the men’s elite field after 49 minutes of racing. The leading group is 11-men strong by Kipchoge is out are the front.

He came into the marathon with hopes and determination to win and so far he looks up to the task.

Susannah Scaroni is also on course to wrap up the women’s wheelchair race as well. Her lead to three minutes after 20 miles.

Marcel Hug wins the Men’s Wheelchair race!

It’s an astounishingly dominant performance from the Swiss who breaks his own Boston Marathon record. It’s his sixth victory here and smashes his previous record with a time of 1:17:06 almost a whole minute faster than his record from 2016.

American runner Emma Bates, who has had top-10 marathon finishes in Chicago, New York, and at the world championships, is at the front of the women’s field, which has now ramped up its pace.

Bates hoped she could be in contention today and it’s so far so good for her.