Nottingham Forest are facing rejection after being linked with Switzerland international .
According to reports in Germany, the Eintracht Frankfurt midfielder is available if his release clause of €30m (£26.4m) is met. Sow could yet remain with Frankfurt, who are chasing Champions League qualification, but with his contract due to expire next year, his club is open to sale this summer.
It was reported at the end of last year that Forest were among at least four Premier League clubs interested in the 26-year-old, who represented his country at the recent World Cup in Qatar.
