Napoli sports chief Pierpaolo Marino has taken a swipe at Inter Milan coach Jose Mourinho.

Marino is unhappy with Mourinho's assertion that Inter do not have to worry about the early season success of clubs like Napoli and Lazio.

The Azzurri chief hit back, saying: "This is what makes football exciting. And it's one thing, unfortunately, that Mourinho appears not to believe in.

"We just have to worry about ourselves. Keep to our own goals. We do not need to make rash predictions and I thank Mourinho for keeping our feet on the ground."