The Spaniard is undergoing rehabilitation after injuring his ACL against Liverpool in February.
"The rehab is perfect," Deulofeu told Sky Sports. "Every day is much better and every day I can do more, my knee is much stronger.
"I don't know when I'm going to be back playing, but what I do know, is I want to be back 100 per cent and healthy.
"I don't want to be back at 50 or 70 per cent because my career will be long, maybe 10 or 12 more years - so to come back one or two months earlier - I don't want to make a mistake. It was a big injury and I want to do things right."