In the battles, the coaches will have to pitch their acts against one another in a series of head to head musical battles.
The coaches will give the artists a song that they must duet on before mentoring each of the competitors both together and separately ahead of the performance.
One winner will be declared in each pairing leaving six acts in each team ahead of the Knockout rounds.
On Saturday we see Nathan Amzi go up against Christina Marie and it sounds as though Nathan was the clear victor.
Will says in the above clip: "People watching this at home, what Nathan just did right now, was he was thrown into outer space, being an animal that lives in the ocean.
"He performed wonderful feats out there in space. You really tore it up.
"That’s like a ballerina going to a football or rugby match and just wrecking shop. Not that I am saying you’re a ballerina…. That was too, too cool. Get it, ballerina tutu?"
Will added: "That was just too too awesome!"
The Voice UK airs this Saturday night from 9PM on BBC One.