Despite losing their last four games against the Sydney Roosters, the St George Illawarra have firmed slightly from $4.50 to $4.20 at TAB to upset the Roosters ($1.23) at WIN Stadium in Wollongong tomorrow night.

The support for the two-time defending premiers has not been overwhelming with 63 percent of money on the Roosters, which has resulted in them easing as favourites since Monday morning from $1.20 to $1.23.

The Sydney Roosters remain $3.50 favourites for the 2020 premiership ahead of Parramatta ($4.50), Melbourne ($5) and Penrith ($5).

In other TAB notes of interest before Round 13:

• The NZ Warriors ($4.50 to $4.10) have received 80 percent of support to stun Manly ($1.20 to $1.24) at Brookvale Oval on Friday night
• Canterbury has firmed from $7 to $5.20 to surprise Melbourne ($1.10 to $1.16) at Sunshine Coast Stadium on Saturday afternoon
• Wests Tigers (as much as $2.50 to $2.35) have garnered 82 percent of interest to upset Newcastle (as short as $1.55 to $1.62) at McDonald Jones Stadium on Saturday night

TAB ODDS

2020 NRL Round 13

$4.20     St George Illawarra          $4.50 Monday 9am

$1.23     Sydney Roosters              $1.20 Monday 9am

Tomorrow 7:50pm AEST at WIN Stadium

$1.24     Manly                                   $1.20 Monday 9am

$4.10     NZ Warriors                        $4.50 Monday 9am

Friday 6pm AEST at Brookvale Oval

$1.26     Souths                                  $1.30 Monday 9am; as short as $1.24 since

$3.90     Brisbane                              $3.50 Monday 9am; as much as $4.10 since

Friday 7:55pm AEST at ANZ Stadium

$1.16     Melbourne                         $1.10 Monday 9am

$5.20     Canterbury                         $7 Monday 9am

Saturday 3pm AEST at Sunshine Coast Stadium

$1.62     Newcastle                           $1.65 Monday 9am; as short as $1.55 since

$2.35     Wests Tigers                       $2.25 Monday 9am; as much as $2.50 since

Saturday 5:30pm AEST at McDonald Jones Stadium

$1.47     Penrith                                 $1.50 Monday 9am; as short as $1.44 since

$2.70     Canberra                             $2.60 Monday 9am; as much as $2.80 since

Saturday 7:35pm AEST at Panthers Stadium

$2.25     Gold Coast                          $2.05 Monday 9am

$1.67     North Queensland           $1.75 Monday 9am

Sunday 2pm AEST at Cbus Super Stadium

$2.90     Cronulla                               $3.10 Monday 9am

$1.42     Parramatta                         $1.37 Monday 9am

Sunday 4:05pm AEST at Netstrata Jubilee Stadium

2020 NRL Premiership

$3.50     Sydney Roosters              $3.50 before Round 12

$4.50     Parramatta                         $4.50 before Round 12

$5           Melbourne                         $5 before Round 12

                Penrith                                 $6 before Round 12

$11         Canberra                             $10 before Round 12

$21         Manly                                   $12 before Round 12

$26         Souths                                  $41 before Round 12

$34         Cronulla                               $41 before Round 12

                Newcastle                           $34 before Round 12

$151       Wests Tigers                       $81 before Round 12

$251       St George Illawarra          $101 before Round 12

$301       Brisbane                              $201 before Round 12

$501       North Queensland           $251 before Round 12

                NZ Warriors                        $401 before Round 12

$1001    Gold Coast                          $1001 before Round 12

$1501    Canterbury                         $1001 before Round 12