Sea Eagles backrower Justin Horo says the performance against the Wests Tigers last weekend was embarrassing and warned his team mates not to be complacent against Cronulla this Sunday.

Coming off three straight wins the Sea Eagles were ruthlessly brought back to earth at Leichhardt Oval and Horo says he hopes that disappointment will inspire their best form against the Sharks.

"We don't liike to be complacent going into any games but everyone's a little bit embarrassed from the effort we put in on the weekend so hopefully we can rectify that", Horo said.

In only his second year at Manly, Horo is beginning to understand the extent of the rivalry between the Sea Eagles and Sharks and knows they'll be fired up for the clash at Brookvale Oval.

"I suppose there is a little bit of a rivalry here and we've got to be ready for another big game on Sunday.", he said.

Also standing in Manly's way is Jeff Robson, a former Sea Eagle and team mate of Horo's during his time at Parramatta, and the Kiwi credits the halfback's return from injury as the catalyst behind the Sharks new-found confidence.

"He just looks like he adds a little bit more direction to the team and they've still got quality players all over the park so once they get it right they showed on the weekend they are a hard team to stop."