By FRED KERBER

There are reports that the Nets and Celtics are working on a sign and trade for Glen “Big Baby” Davis and that it could happen real soon with the Nets surrendering Yi Jianlian.

That’s news to both sides.

People in Boston and New Jersey both squashed the notion. Nets insiders confirm that there have been inquiries about Davis “to see what’s up and what they’re looking for,” one source said. Both sides insist they have not been working on a sign and trade.

Meanwhile, the Nets are maintaining the stance they’ve had throughout free agency. They’re going to watch, wait and not rush. They want to do something to upgrade the frontcourt but the weight of 15 guaranteed contracts is as helpful as ingrown toenails. So nothing is imminent but they are checking every avenue.