Reports indicate Celtic has turned down a £14 million offer from Nottingham Forest for midfielder Arne Engels. This news comes amid a flurry of transfer speculation involving several Scottish Premiership clubs. The transfer window is always a busy period, and clubs are looking to strengthen their squads for the upcoming season.

In other potential moves, Celtic is reportedly close to signing Lorient forward Joel Mvuka for £4 million. A loan deal for Freiburg striker Junior Adama is also verbally agreed. The club's manager, Martin O'Neill, also suggested the need for another defender before allowing Stephen Welsh to go on loan. This suggests a focus on squad depth.

Across the city, Rangers have a verbal agreement to sign Ryan Naderi from Hansa Rostock, but the player won't arrive until summer. St Mirren's Ryan Mooney is attracting interest from Arsenal, and Aberdeen's Sivert Heltne Nilsen expressed concerns about his team's performance. These movements highlight the dynamic nature of football transfers.

With the transfer window open, clubs continue to assess their needs and make moves to improve their teams. The rejected bid for Engels suggests Celtic values the player highly. Fans will be watching closely to see how these potential deals impact the teams' performances in the upcoming season.