WILL Chambers says the Melbourne Storm must not rely on defence alone to get out of jams.
The Storm remain undefeated despite trailing in three of the first four premiership games.
"You don't want to be putting yourselves under pressure like we did (against West Tigers)," Chambers said.
"We didn't start well at all, and that was the most important thing.
"We need to start well this week, especially playing Penrith. (If we give) them as much opportunity as we gave Wests (Tigers) they'll really put us to the sword ... they can score points from anywhere if we're not on our game early on."
The experienced centre said ball control would be crucial on Saturday night after sloppy errors last week allowed the Tigers to pile on two unanswered tries for an early 14-0 lead at Leichhardt Oval.
A bullocking Nelson Asofa-Solomona try just before half-time got the Storm back in the game, before three barnstorming second-half tries put the game beyond doubt.
"We made it so hard on ourselves early and couldn't control the ball," Chambers said.
"We got in at half-time, we regrouped and we got it all right in the second half and were lucky enough to come away with the win.
"We coughed up that much possession and all of a sudden we're just defending our try line and eventually we were going to break."
Despite patchy early season form, Chambers warned the Storm's best is still to come.
"We got a lot of improvement as well, we have defended really well," Chambers said.
"Our attack is coming along slowly, but if we get our attack right I think we're a fair footy side and I think we can go okay this year."
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