BERLIN (AP) — Russian opposition leader Alexei Navalny is recovering from the suspected assassination attempt last month faster than expected, one of his aides said Sunday.

Navalny, who collapsed on a plane from Siberia to Moscow on Aug. 20 and spent nearly three weeks in a coma, was discharged last week from the Berlin hospital where he was being treated. His doctors said that based on Navalny’s progress a “complete recovery is possible.”

“He is doing much better, I would say unexpectedly better,” Leonid Volkov, Navalnyís chief of staff, told German broadcaster RTL. “I think the recovery is really faster than expected, and of course this is good news that makes us very happy.”

Navalny, a longtime foe of Russian President Vladimir Putin, is still receiving outpatient treatment and remains under close protection, Volkov said.