Chris McKenna today revealed he hit an all-time low after losing the Grand Final with Leeds but is now ready to

produce his best ever form - in a Bulls shirt.

The Aussie second-row has been brought to Odsal after three years at the home of their arch-rivals.

His final game for the Rhinos ended in agony when the Bulls inflicted that 15-6 Old Trafford loss and it left him hugely downbeat.

But, after a difficult period of

reflection, the prospect of returning to England with a new club and the imminent chance to battle for the World Club Challenge reignited his desire.

"I was looking for motivation after that Grand Final defeat," McKenna admitted.

"I was down. I went home for the first time in three years and probably lived it up for a few weeks.

"I struggled when I started my training again but fought through that and then started thinking about the World Club Challenge. That got the excitement back.

"I did a good three weeks' training before I flew back here and now I am really looking forward to the season starting with the Bulls."

McKenna has big shoes to fill having replaced inspirational skipper Jamie Peacock and some critics have

questioned Brian Noble's wisdom in signing the 31-year-old former Aussie Test star.

But the player himself believes his best years are still to come and he admitted: "My final year at Leeds was definitely my best.

"But I still don't think I've peaked. There's definitely more in my game I can develop. I had a couple of injuries in my first season here and I sort of built myself up as time went on. Now I'm looking to kick on from where I left off last year.

"I've a bit more work to do on my skills and I feel they are developing. I'm more likely to try things now."

McKenna made his name as a

centre at Brisbane and Cronulla before more recently switching to the back row.

A hard-working forward who gets through the defensive graft but also offers a potent attacking threat given his threequarters background, he played the majority of last year in the Rhinos second row, scoring nine tries.

"I definitely prefer it there," he admitted, while contemplating the exciting prospect of playing alongside the likes of powerhouses Stuart Fielden, Joe Vagana and Brad Meyers.

"And Bradford do have a big, strong pack. They get some great go-forward and can be very intimidating when they get a roll on.

"They are hard to stop and it's going to be great playing behind those boys instead of in front of them."

McKenna has signed a two-year deal at Odsal and joined up with his new team-mates for the first time last week.

He is likely to debut in the friendly at Huddersfield on January 22 before attempting to win back-to-back World Club Challenges - the Aussie was part of Leeds Rhinos' victorious side last February.