Celtic have reportedly initiated discussions regarding a potential transfer for Borussia Dortmund winger Cole Campbell. The 20-year-old is not believed to be included in the plans of manager Niko Kovač, and it is said that Dortmund are willing to allow his departure. Campbell was on loan at Hoffenheim for the second half of the previous season, where the club chose not to exercise an option to make the transfer permanent for approximately €7.5 million.