James "the jet" Roberts took off in the Grand Final rematch, his best peformance in a Broncos jersey.

Brisbane Broncos centre James Roberts says he needs to improve his defence if he is to continue the form that saw him star in Brisbane's one-point win over the North Queensland Cowboys on Friday night.  

Roberts scored his first try of his Broncos career, breaking a six-game try-scoring drought in the process. 

He accumulated 179 run metres and made three line breaks in a performance that saw him named Man of the Match by the Broncos staff.   

Roberts said that although he is happy with his performance, he still needs to work on his efforts in defence. 

"The try was worth the wait. I've been working on my defensive efforts and making sure I got that right. It's paid off," Roberts said.  

"I've just been trying to get myself more involved by getting some early touches and it panned out well against the Cowboys. 

"It's a confidence-booster but I'm more worried about my defence. The attack will come with that. As long as I have my defence down then we should be winning games." 

Brisbane will be winning many more games this season if Anthony Milford and Roberts continue to strengthen their combination in attack.

Roberts set up Milford for a four-pointer in the first half and Milford returned the favour late in the game to give Brisbane the momentum heading into extra-time. 

"'Milf' and I have been trying to work up a bit of combination. As long as I get the ball in my hands then I don't care who gives it to me," Roberts said. 

"It was good that 'Milf' took the line on a lot and opened it up a bit for me. 

"He's a very unpredictable player so he can be hard to read. I'm just happy that I was there to back him up throughout the match and I was rewarded with a try."

Roberts will next head to the Gold Coast for the M1 Derby against his former team the Titans. 

Friday night will be the first time the 23-year-old has faced his old club, with the top-four clash set to be the biggest meeting between the two sides in recent history.