Saturday's episode of the BBC One show gained momentum on its previous week's launch, posting impressive figures of more than 9 million viewers.
And while Britain's Got Talent also climbed, and won the night with 10.8 million, it lost out to The Voice as the two shows went head to head in a 20 minute overlap.
Boss Simon, who reportedly edited Saturday night's show himself repeatedly until the last possible minute, wants to close the gap.
“Simon has been working the team around the clock and ordering dozens of re-edits in a bid to improve the show," one insider revealed to the Daily Mirror. “He wants every show to be better and better, but a lot of the strongest contestants have already been in the early shows. Staff are being pushed to breaking point because of this war.
“Executives hoped The Voice’s audience would dwindle after the first show, but that has not been the case. For a long time Simon has been the king of reality TV, but these figures prove he’s not the only man who knows how to create a hit.”
The Voice is currently half way through its audition process, with the live shows starting at the end of this month, which will air until June.
Britain's Got Talent meanwhile will continue airing its auditions throughout this month, with a week of live shows airing at the beginning of May.
An ITV source claimed to the newspaper that they were confident that BGT would end up beating The Voice in the next coming weeks.
“Britain’s Got Talent traditionally grows week on week, and when The Voice has aired abroad it has tended to lose viewers in the later stages once the blind auditions phase has ended. We’re confident BGT is still the biggest," they said.