Despite the double disappointment of relegation from the Premier League and missing out on Croatia's Euro 2012 squad, the 32-year-old believes he is better than ever.
"I've become more experienced, but feel more like a 25-year-old. It sounds arrogant, but there are not often many strikers of my quality [available]. I feel fit and am healthy," he told Bild.
Four years ago, Klasnic scored two goals during Croatia's 2008 European Championship campaign - a deed all the more remarkable as he had endured a kidney transplant in 2007. He was omitted from Slaven Bilic's squad this time around, but has no hard feelings.
|30/1||Croatia are now 30/1 with Paddy Power to win Euro 2012.|
"[Missing out on Euro 2012] only makes me stronger. I must accept it, keep my fingers crossed for my fellow countrymen."
Klasnic enjoyed a a prosperous spell at Werder Bremen scoring 49 goals in 151 games between 2001 and 2008, but doesn't envision a return to his old stomping ground and is worried his former club may struggle after their relegation from the Bundesliga.
"Bremen was a great time. But it is long gone. Werder have to watch out now anyway - I'm worried about Werder. There are a lack of experienced players to show the boys where to go. For Werder it will be hard to get back up.
"We will see what happens, who comes in for [my] services. For me at least, I do not have to worry."