Parramatta are on the verge of becoming the best backed team to win the Premiership with TAB, but punters remain cautious around South Sydney despite their odds being cut from $15-$10.

The Roosters narrowly head the title betting from Melbourne with both enjoying around 20 per cent of the market share despite their odds drifting following weekend losses.

The Eels, however, continue to attract strong support with close to 19 per cent of the Premiership hold now, while Souths remain adrift of Manly and title favourites Penrith.

TAB’s odds for Round four have been released below with the Panthers $1.36 favourites in the Grand Final rematch against Souths who are $3.15 outsiders.

TAB Odds

NRL – Premiership

$4.00    Penrith

$5.00    Melbourne (were $4.75)

$8.00    Roosters (were $6.50)

Parramatta (were $10)

$10        South Sydney (were $15)

$13        Manly

$15        Cronulla (were $17)

$21        Canberra (were $29)

$23        Newcastle (were $19)

$26        Brisbane (were $21)

$29        Gold Coast (were $26)

$34        St George Illawarra (were $26)

$51        Bulldogs (were $26)

North Queensland (were $67)

$81        Warriors

$151      Wests Tigers (were $101)

TAB Odds

NRL – Round 4

$1.27    Gold Coast

$3.75    Wests Tigers

$1.40    Cronulla

$2.90    Newcastle

$1.36    Penrith

$3.15    South Sydney

$2.30    Warriors

$1.60    Brisbane

$1.36    Manly

$3.15    Canberra

$2.60    North Qld

$1.50    Roosters

$1.20    Melbourne

$4.50    Bulldogs

$1.33    Parramatta

$3.35    St George Illawarra