PREVIEW-Soccer-Juve's Ranieri returns to Fiorentina

By Mark Meadows

MILAN, Oct 4 (Reuters) - Juventus coach Claudio Ranieri faces a tricky return to former club Fiorentina and struggling AC Milan visit an upbeat Lazio in Sunday's top Serie A clashes.

Champions and league leaders Inter Milan host fifth-placed Napoli on Saturday with striker Zlatan Ibrahimovic in superb form following his fourth double of the season in the 2-0 Champions League win over PSV Eindhoven on Tuesday.

The Sweden forward has seven league goals this term and is joint top scorer with Juve's David Trezeguet, who has jumped straight back into top flight football despite spending last season in Serie B following his side's match-fixing demotion.

The France striker will find life tougher against flying Fiorentina, who have coped with Luca Toni's departure to Bayern Munich thanks to the form of ex-Juventus forward Adrian Mutu.

Inter top the table on 14 points with Juve just one point behind and Fiorentina in third place on 12.

Ranieri was boss of the Florence club between 1993 and 1997 but goes back without suspended midfielder Cristiano Zanetti, who started his career at Fiorentina.

Juventus fans will also be banned after the match was ruled to have a high risk of trouble following violence before last weekend's Turin derby between Juve and Torino.

Milan have suffered a lacklustre start, winning their opener and then drawing 1-1 four times and losing at Palermo.