Sassuolo are the first Serie A side to return to training following the coronavirus shutdown.
The Italian side said that their players could use the club's facilities from Monday on an optional basis. Bologna, meanwhile, say their players will be able to start training from Tuesday.
Football activities in Italy have been suspended since March 9 but the league and Italian FA have been pushing for the restart of the season as the pandemic eases out.
The government has given professional teams permission to train together from May 18 although they will still have to respect social distancing guidelines.
Sassuolo and Bologna are based in the region of Emilia Romagna which has given special permission for athletes in team sports to take part in training sessions on an individual basis from May 4 onwards.
"Sassuolo announces that, from Monday May 4, they will grant their players use of the Mapei Football Centre pitches for optional, individual sessions," Sassuolo said in a statement.
The club said that only players would be allowed to access the pitches while the use of indoor facilities would be prohibited. Under Sassuolo's guidelines, each player would have half a pitch to himself.