Derry City boss Ruaidhri Higgins says selling Eoin Toal would be “a huge loss” amid interest from Wanderers.
The Whites are set to step up their chase for the 23-year-old centre-back as Ian Evatt aims to bolster his defensive ranks ahead of the new season.
Toal has made over 150 appearances for the Candy Stripes, attracting interest from other English clubs.
He has also represented Northern Ireland at Under-21 level and is out of contract at the end of the current campaign in Ireland.
Higgins called Toal “a brilliant servant” but admits most League of Ireland managers accept that moves are likely to happen when young players impress.
“At this minute in time I don’t know if Bolton have made another offer,” he told The Derry Journal.
“We all know that their first offer was rejected and at the minute I don’t think they have made an improved offer, but that may change as the week progresses.
"Eoin Toal has been an absolutely brilliant servant for this club and he’s only 23. He has played a lot of games and I can only speak since I have been here, but he has been fantastic.
“If he does leave then it would be a huge loss, but as we sit here now, there’s nothing confirmed or agreed or anything like that.
“We will need to replace him or we’ll need to adapt or play a different system, I don’t know, because nothing has happened since last week’s bid was rejected."
Wanderers have already brought in Jack Iredale and Conor Bradley this summer, as well as re-signing James Trafford on loan from Manchester City.
Social, newsletters, subscriptions and getting in touch...
You can follow the Bolton News on social media by joining us on Facebook, Twitter and Instagram
We also have dedicated Facebook groups on Crime & Court, Traffic & Travel, Nostalgia and our Camera Club page
If you want to make sure you don't miss the most important news stories every day, sign up to one of our free e-mail newsletters
Gain unlimited access to the Bolton News website with a premium digital subscription
Or if you want the Bolton News newspaper delivered to your door, get in touch with our home delivery team or call us on 0800 953 0227
Finally, have you got a story for us? If so, contact us at newsdesk@theboltonnews.co.uk or by using our online contribution form
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here