Southampton boss Ronald Koeman says he needs time to assess players inside the final year of their deals.
The likes of Jack Cork and Jose Fonte could commit to a pre-contract in less than six months' time.
"That's a little bit too fast to have that kind of opinion," said Koeman.
"I need more time. But they are important players and always, if they will come in last season of contract, you have to do something at the club, and we will talk about that and we will make decisions about that. But it's a little bit too early now."
