Football - UPDATE 1-Soccer-Napoli docked two points over betting scandal

* Title chasers drop down to fifth

* Paolo Cannavaro banned for six months (Adds details)

ROME, Dec 18 (Reuters) - Serie A title chasers Napoli were docked two points on Tuesday in Italy's latest match-fixing shame as three players were banned for between six months and three years over bets placed on a match with Sampdoria in 2010.

Paolo Cannavaro, brother of Italy great Fabio, and fellow Napoli defender Gianluca Grava received six-month bans while former goalkeeper Matteo Gianello was banned for three years and three months, an Italian Football Federation statement said.

Napoli, who now drop to fifth from third place in Serie A to lie 10 points behind leaders Juventus, were also fined 70,000 euros ($92,100).

The case is the latest in a string of match-fixing and betting scandals which have tainted Italian soccer and led to a number of players arrested.

Champions Juventus, demoted in a 2006 match-fixing scandal involving referees, recently welcomed back coach Antonio Conte from a four-month ban for failing to inform authorities of match-fixing at previous club Siena.

In this case Gianello, who is no longer with Napoli, was accused of trying to fix the result of the match in order to bet on a Sampdoria victory. He was accused of trying to involve Cannavaro and Grava, both of whom refused.

The duo were accused of failing to inform authorities of the offer.

The federation prosecutor, acting on evidence gleaned from a criminal investigation in Naples, had asked for Cannavaro and Grava to receive nine-month bans and the club to be deducted one point but a disciplinary commission tweaked the sanctions.

The 1-0 win for Samp on the last day of the season in 2010 enabled them to reach the Champions League qualifying rounds.

Pundits expect Napoli to appeal against the decision of the federation's disciplinary commission, which also imposed a fresh raft of points deductions, bans and fines for lower-league teams and players caught up in the widespread betting scandal. ($1 = 0.7598 euros) (Reporting By James Mackenzie, editing by Mark Meadows)