Portsmouth executive chairman Peter Storrie says Richard Hughes and Sean Davis will follow Glen Johnson by signing new contracts.
He said: "These are Tony Adams' decisions.
"He decides when he wants to offer someone a new deal and that is what is happening at the moment. Glen Johnson, to me, is the best right-back in the country and I think it's fantastic he wants to stay at this football club.
"It just goes to show the players are right behind the manager and can see a future here.
"I think it's a massive boost to everyone.
"With Sean and Richard, he clearly feels they have shown the application to the team he wanted and he would like them to stay."