After what is expected to be a neck-and-neck fight between rivals PTI and PML-N, it will likely boil down to the 12 per cent or so undecided voters to determine the fate of the next government, a new poll has shown.

The poll computed by Gallup Pakistan based on data from five separate polls carried out in the months leading up to the July 25 elections forecasts that the Imran Khan-led PTI will likely emerge as the largest party on the national level, but that it will be followed closely by the embattled PML-N in terms of vote.

"The conclusion shared by nearly all pollsters is that it is an unpredictable election," Gallup Pakistan wrote in its report.

The "poll of polls" indicates that the undecided voters may tilt the balance of the election in Punjab, the country's largest province, thus ultimately deciding which party reaches the national corridors of power.

See more interesting findings from the poll of polls here.