Leicester have surpassed all expectations this season, and they currently sit at the top of the Premier League table after 23 matches have been played.
Despite their wonderful performance to date, everyone involved in the Foxes's squad has played down their chances of finishing on top of the pile in public.
Leicester’s players and management staff have insisted that they are not talking about winning the league, but Merson feels that Ranieri should be telling his squad that they are on the verge of making history.
“The manager should be in there making them talk about it [winnnig the title],” Merson said. “This could go down as one of the biggest things ever to happen in football - people could be talking about it in 70, 80 years time.
“The manager should be saying we can win this league. This is once a lifetime.”
Leicester are currently three points clear at the top of the table, with Manchester City and Arsenal their nearest challengers.
The Foxes do have a tough set of fixtures coming up, which should test their title winning credentials.
Ranieri’s men are set to host Liverpool tonight, before they face City and Arsenal over the next two weekends.