One in five undecided in western Syd poll

One in five voters in the key election battleground of Sydney's west are undecided, a new poll has found.

The NewsLocal-papers poll shows the two leaders neck and neck, with voters picking the economy as the most pressing issue, the Daily Telegraph reports.

Both the prime minister and the opposition leader have spent several days campaigning in the area, which has emerged as key region for the July 2 election.