AC Milan chief executive Adriano Galliani said he was confident Leonardo would stay on as coach next season ahead of the third-placed team's visit to Sampdoria on Sunday.
"He has a two-year contract, I'll convince him to stay," Galliani told Friday's La Gazzetta dello Sport in response to media reports that Leonardo could take over as Brazil boss after the World Cup.
Sampdoria, who are level on points with fourth-placed Palermo, will be without suspended defender Daniele Gastaldello as they look to boost their bid to secure Italy's final Champions League slot.
Brazil centre-back Juan should return from a thigh problem for Roma, who moved a point ahead of champions Inter Milan by beating Atalanta 2-1 last weekend, in Sunday's derby with Lazio.
Authorities have restricted access to second-placed Inter's home game against Juventus on Friday to season ticket holders and people with the new supporters' card, who can also buy tickets for family members, to avert trouble.
Inter defender Cristian Chivu is suspended for the game being played on Friday to give the hosts an extra day's rest before Tuesday's Champions League semi-final first leg against Barcelona.
