His close people consider he could come back before a month, specially because historically he has always recovered fast
Dani Alves got injured in FC Barcelona's debut in La Liga against Athletic Club, but it seems that evolution is on good way. The club has only limited to communicate that the player suffered "an injury to the adductor of his right leg," but Weloba can expand that the Brazilian suffered a small strain in the adductor when he was tackled by Aduriz.
The right-back of the club is doing one or two daily sessions of recovery and the doctor said that he believes he will be full recovered in a month. Looking at the calendar with these deadlines, the date of return would be on Wednesday 23 of September, in the Celta - Barcelona and would miss La Liga games against Atlético Madrid and Levante over the debut in the Champions League against Roma. However, the player has good feelings and people close to him think he could come back even before one month, mainly because historically he has recovered quickly.
In the new communication policy on injuries this season, Barcelona did not communicate the exact time of his absence, but Dani Alves has no problems in explaining publicly how many time he will be out.