The Slovakia centre-back has put in numerous commanding performances and has also weighed in with four goals this season, more than doubling his tally from the previous four years.
But the 27-year-old believes there is still plenty more to come from him, and he said: "For the last few months I have been pleased with my performances. There is no reason for it. I have just tried to do my best and not put too much pressure on myself."
He added: "It helps that the team is doing well too. When the team is playing at a high level, it gives everybody confidence to reach their levels.
"Experience has a lot to do with it. As you get older you learn how to deal with success and failure and I feel a lot more confident in my ability to make the right decisions.
"In the last 18 months a lot has changed and I think everybody agrees that it has changed for the better.
"Nobody is complete. You see players older than me trying to get better and that inspires you.
"You see people like Bellars (Craig Bellamy); ones who give everything every day.
"He has been very successful for a long time but he still wants to be the best.
"You have to have that attitude. I am 27 now and I think I can still improve."
Source: PA
Source: PA