Celtic could be set for a windfall in excess of £5million after Liverpool stepped up their interest in signing Jeremie Frimpong from Bayer Leverkusen.
Earmarked as the main target to replace Trent Alexander-Arnold at right-back in the summer, Liverpool are in hot pursuit of the 24-year-old Holland international.
Frimpong was a revelation during his two seasons with Celtic, joining for a fee of around £350,000 before being sold to Leverkusen for £11.5m just 18 months later.
It is understood that Celtic had a clause in the deal with Leverkusen which would see them bank 30 per cent of the profit on any future transfer.