
Martin Murray admits Gennady Golovkin is yet to show any signs of vulnerability as he prepares to face the WBA middleweight champion this weekend.
The unbeaten Kazakh is considered one of the most fearsome fighters in the sport after racking up a chilling run of 28 stoppages in 31 victories.
Murray will try to end this air of invincibility when he battles Golovkin in Monte Carlo this Saturday and has already proved his mettle in two world title fights.
Felix Sturm was pushed to a draw by the St Helens man in 2011, while he floored Sergio Martinez in a contentious points loss, but Murray believes he is battling his toughest foe.
"I don't see any weakness in Golovkin to be honest," Murray said. "With Martinez and Sturm, they had both been beaten so we were able to see chinks in their armour and study them before I fought them.
"With Golovkin, he has never been beaten or knocked down and he has not shown any chinks in his armour yet. He's younger and fresher than Sturm and Martinez were when I fought them as well."
In the past few weeks, Murray has put the finishing touches to his tactics with trainer Oliver Harrison and has vowed to finish the fight with 'no regrets'.
"There are things that we have been working on that we are confident of will work in the fight on Saturday," said Murray. "There are about 10 game plans we have, all rolled into one. They are for all the different scenarios as to what might happen.
"All I know is that I'm ready to go 12 tough rounds with Golovkin. It's about finishing the fight with no regrets, knowing I've trained harder over 12 weeks than I ever have and felt fitter than I ever have.
"I've never trained at altitude before and I've never worked harder in training. This is definitely the fittest I've felt going into a fight."