former west ham midfielder diamanti struck just after the hour mark , before on loan chelsea winger salah added a second just two minutes later .
miralem 's goal gave as roma a 1-0 win over napoli in serie a on saturday , their first home victory for more than four months .
roma last won at home against inter milan in november , gestured towards the press box after his goal .
elsewhere on saturday , carlos tevez scored a thunderous free kick to help leaders juventus beat empoli 2-0 to stay 14 points clear at the top .