Following last Saturday night's final blind audition show, Will and his fellow coaches each have twelve acts in their teams.
In the battles each coach will pit their singers against one another in a series of musical duels.
Both artists will have to sing the same song at the same time with their mentor alone deciding the winner, who will progress through to the Knockout rounds.
However, that's not necessarily the end for the losers because the coaches will again this year have the chance to `steal' a rejected artist for their own team.
Amongst the battles on Team Will are Anna McLuckie up against Jessica Steele and favourite Sophie May Williams facing off against Cherri Prince.
Jermain Jackman will battle Sarah Eden-Winn while Callum Crowley will be trying to out sing Tom Barnell.
Other acts on the Black Eyed Peas star team are Iesher Haughton, James Byron, Femi Santiago and Kiki deVille
Helping Will out will be his old pal and former member of the Peas, Dante Santiago and last year's runner up and member of Team Will Leah McFall.
The battles begin this Saturday night at 7PM on BBC One.