LONDON — McKayla Maroney’s busted big toe won’t keep her from vaulting for the U.S. in Sunday’s Olympic team qualification.

The reigning world champion on the event will anchor the heavy gold medal favorites as they begin their quest for their first Olympic title since the 1996 Atlanta Games.

The 16-year-old Maroney aggravated an injury to her right big toe during practice last week but looked fine during podium training Thursday, drilling a series of difficult Amanar vaults that give the U.S. a decided advantage over the rest of the 12-team field.

World all-around champion Jordyn Wieber, trials winner Gabby Douglas and team captain Aly Raisman will do all four events for the U.S., with Kyla Ross replacing Maroney on uneven bars, balance beam and floor exercise.

The U.S. dominated at worlds in Tokyo last fall, winning the team crown by a whopping four points, a blowout that could be repeated at the O2 Arena over the next week.

Opposing countries have been so curious about what the Americans are doing that they have “accidentally” wandered by the team’s practice sessions.

They needn’t have been so secretive. Maroney and company were only too glad to put on a display during podium training, working like a pink-clad machine, particularly on vault.

The U.S. is the only country in the field that has four competitors who can do the Amanar, named after 1996 vault champion Simona Amanar. It is arguably the toughest vault being done in competition, and the ability of the U.S. to land the high-scoring skill four times gives it a significant point cushion that will be difficult for opposing countries to overcome.

Each team enters four athletes per event, with the top three scores counting.

The top eight teams at the end of the night make the finals on Tuesday, which moves to the “three-up, three-count” format.

The stiffest test for the U.S. is expected to come from defending Olympic champion China, Russia and a resurgent Romanian squad that won the European championships handily this spring.

Still, there’s little doubt the U.S. is the team to catch, particularly with Maroney healthy enough to do her thing.