England wing Jack Nowell is set to miss the start of the Premiership season.
Nowell, who started every game of England's Six Nations campaign, returned to training with Exeter this week after having knee surgery in May.
The 21-year-old was forced to
Asked if he would be fit for the Chiefs' first game on 7 September, Nowell told BBC Radio Devon: "That was the goal I set at the start but I'm concentrating on coming back 100%."
|Made his Premiership debut against London Irish in November 2012|
|Named LV= Cup Breakthrough Player of the Year in March 2013|
|Was part of the England team that won the 2013 Junior World Cup, scoring a try in the final against Wales|
|Made senior England debut in Paris against France in 2014 Six Nations|
|Scored his first senior England try against Italy in Rome|
|Signed a new three-year contract at Exeter in June 2014|
He added: "I'm not going to have this chance again to have all this time off, so I'm going to make sure I'm 100% before I'm back on the pitch.
"It's gone really well and I'm feeling really fit, I trained this week for the first time and it was nice to get back out there with the boys.
"My knee has always been in the back of my mind when I've been playing.
"But now that I've had this operation there's a new confidence that I've been given. When I'm in the gym squatting, I couldn't do it before, whereas now I'm lifting the most weight I've ever done."
Nowell said he was now focused on forcing his way into Stuart Lancaster's England squad for next year's World Cup.
"Stuart Lancaster says he's going to pick the people who are on form for their clubs," he said.
"So I need to get my Exeter shirt back and perform as well as I was last year, that's the first thing I need to do."