The futures of midfielders Olivier Ntcham and Morgan Sanson at Celtic and Marseille respectively are linked, according to the Daily Record.
They report that the French club can only afford to buy Ntcham from Parkhead if they offload a current option in their engine room.
And Sanson has been offered to Premier League clubs West Ham, Wolves and Newcastle United this summer, according to Sky Sports.
They report that Sanson can be signed for around 35 million euros (£31.1 million) – and the Record say that Ntcham’s deal is off without it.

The report says that Celtic are keen to secure around £12 million for the services of Ntcham, which would also go a long way towards helping the club revamp their squad as well.
This is the nature of the game in the window, deals depending on each other as clubs jostle to get value in the market and sort their own affairs out before letting players go.
Celtic need to try and push on to the next level, keeping Rangers at bay, ensuring greater progression in European competition as well as moving back towards the more attractive style Brendan Rodgers preferred – after Neil Lennon’s pragmatic end to the season.
Receive weekly football news and updates to your mailbox
