Anderton was withdrawn in the first half against Manchester United and tests will reveal the extent of the injury.
"We don't think it is bad, he felt his calf very early in the game and it was very much a blow for us," said Chris on Monday. Having said that, Gus Poyet came on and did very well.
"We'll certainly find out in the next day or two about Darren, going to Portsmouth is obviously a big game for him and I'm sure he'll make every effort to be fit."
Chris Hughton reports that Darren Anderton's calf injury is not suspected to be a serious setback for the in-form midfielder.