"Hopefully, I will be back in the Wales team for the autumn internationals," said Phillips, who ruptured his cruciate ligament during the Ospreys' 30-3 EDF Energy Cup semi-final win over Sarcacens.
"I started running a couple of weeks ago and hopefully I will be back by the end of September," Phillips told the Western Mail.
"I definitely want to be hitting form by the time selection comes up for the autumn internationals. That's the goal we all have, getting into the Welsh squad.
"I'm dying to get back and things are going well so far. But my main concern is making sure that I come back fully fit without forcing the knee too early."