NEWCASTLE, AUSTRALIA - JULY 02: Chris Walker of the Roosters in action during the round 17 NRL match between the Newcastle Knights and the Sydney Roosters at Energy Australia Stadium July 2, 2005 in Newcastle, Australia. (Photo by Matt King/Getty Images)

Former Queensland winger Chris Walker is our guest tipper for Round 18.

Walker represented his state on six occasions across 2001-2002, scoring four tries in back-to-back unbeaten series'.

His NRL career spanned from 1999-2011, and the journeyman played for the Broncos, Rabbitohs, Roosters, Storm, Titans and Eels.

During the late 1990s while at the Broncos, Walker was playing alongside his two brothers in Shane and Ben.

To keep up to date with Walker, you can follow him on Twitter at @iam_chriswalker.

Walker's Round 18 tips:

Panthers v Sharks

"Sharks will win as they don’t have as many players backing up from Origin."

Tip: Sharks by 12

Knights v Eels

"Knights, but this game won’t live up to anything great, the Eels have been disappointing this season."

Tip: Knights by 8

Bulldogs v Rabboths

"Rabbits, the Bulldogs like the Eels lack strike power on their right side relying on the Morris boys in attack."

Tip: Rabbitohs by 26

Sea Eagles v Storm

"I think the storm will be to strong for the Sea Eagles, cam smith plays with to much composure."

Tip: Storm by 20

Raiders v Cowboys

"I think the Raiders can win on the back of their last gasp win against the Bulldogs and keep their season alive."

Tip: Raiders by 12

Broncos v Warriors

"The Broncos are setting themselves nicely coming into the semifinals I think they will be to strong for the warriors."

Tip: Broncos by 18

Dragons v Wests Tigers

"The Dragons are flying this year and they will beat the Wests Tigers who after a great start to the season are stumbling."

Tip: Dragons by 22

Titans v Roosters

"After last week performance of the Gold Coast Titans, the Roosters have some much more strike power across their team, the Titans need to restore some pride back into their jersey."

Tip: Roosters by 16