Lazio coach Vladimir Petkovic insists he's happy in Rome.

Petkovic has been linked with Borussia Dortmund in recent days.

"I am very happy to be at Lazio," he said. "A few months ago I could not have imagined being at this level so quickly.

"I am and will be concentrated, giving my all for Lazio. I am not thinking about a contract renewal because I am perfectly happy with the one I have now. There is no need to rock the boat."