The England international has suffered a nasty knee injury and could be out for some time.
Everton drew with newly promoted Leicester City in the opening game of the Premier League season and they should have wrapped up victory but just lacked that cutting edge - the cutting edge Ross Barkley might have provided.
The young midfielder was in top form last term, his breakthrough season, with performances of such a high calibre that he earned a place in the England squad for the World Cup this summer.
But unfortunately for Barkley things have taken a terrible twist, after suffering a knee injury in training on Friday.
Now Roberto Martinez has given an update on the injury and it sounds like Barkley is going to be out for a big portion of the season:
"He had a scan but it was a bit difficult to determine the extent. With the swelling we don't really know how bad the injury is. We know it's a partial tear but that could be anything between seven weeks and I've seen injuries like that that take four or five months. Ross Barkley is a phenomenal footballer and we're going to miss him, there's no doubt about it. He was so sharp in pre-season, I thought he came back with a different approach. He was very unfortunate to (sustain the injury) through an innocuous challenge in training and now he's going to be out for a long, long time."
It is not the first time Barkley has suffered a serious injury. He broke his leg in two places when younger and Everton fans will be hoping that his injury is not as serious as it is currently being feared.