Only seven points separate the two sides but the league's top scorer believes Fiorentina still have a long way to go before they can be considered genuine title contenders.

"Juventus, AC Milan and Inter Milan are on another level from us," said the 28-year-old Italy international who scored his 16th goal of the season in last Sunday's 1-1 draw at Roma.

"Even Roma, when they find their feet, have more quality in depth. For us it would be a dream to finish in fourth place."

Fiorentina coach Cesare Prandelli has been equally cautious about his team's lofty league position.

"We should enjoy it, but we must also remember where we've come from," said the 49-year-old former Juventus player.

"The club survived relegation on the final day last season, so we will celebrate when we reach 45 points."

Juventus' striker Zlatan Ibrahimovic has given the reigning champions a welcome boost ahead of Sunday's clash by pledging his loyalty to the club for whom he signed from Ajax last summer.

"After Juve, there's no-one else," said the 24-year-old Swedish striker.

"For me, they are the ultimate and I would like to stay here forever."

Ibrahimovic has only scored three goals in Serie A, but Juventus coach Fabio Capello believes the giant Swede has been fundamental to the Turin club's grip on first place.

"He has been decisive for us even when he hasn't been scoring," he said.

Fiorentina fans have been jumping through hoops to try and buy tickets for the visit of the title-holders with a capacity crowd of 47,000 expected at the Artemio Franchi stadium.

Second-placed AC Milan, who are five points behind Juventus, play away to Chievo on Saturday.

Carlo Ancelotti remains confident his team can close the gap on Juventus.

"Juventus have set a fast pace, but we too are going strong," he said.

"We have more quality than them and that convinces me we can catch them."

FIXTURES
(All 1400 GMT kick-off unless stated)
Saturday
Chievo v AC Milan (1700), Inter Milan v Ascoli (1930)
Sunday
Fiorentina v Juventus, Lazio v Siena, Lecce v Roma (1930), Palermo v Cagliari, Reggina v Parma, Sampdoria v Empoli, Treviso v Messina, Udinese v Livorno