Motherwell have rejected a second bid from Celtic for goalkeeper Trevor Carson.

It is understood the Parkhead side upped their offer to £375,000 after their initial £200,000 bid was rejected on Monday, but Motherwell value him at double that.

Celtic are in the market for a shot-stopper after number one Craig Gordon was sidelined for up to 12 weeks with a knee injury.

The January transfer window closes at midnight on Wednesday in Scotland.

Celtic boss Brendan Rodgers hinted on Monday he would continue to play Dorus de Vries in Gordon's absence and a new keeper would likely provide cover for the Dutchman.

Third choice Conor Hazard is currently on loan at Falkirk.

Carson joined Motherwell in the summer from Hartlepool and has fast become a key player for Stephen Robinson between the sticks.

He has another two-and-a-half years remaining on his Motherwell contract.

Celtic have also been linked with Newcastle's Freddie Woodman but Aberdeen hope to close a deal with the keeper after the club's respective fixtures on Wednesday.