EXCLUSIVE from Graeme BaileyTBR Football understands that Manchester City were one of the teams in Borussia Dortmund on Wednesday watching Chelsea’s Ian Maatsen. The Chelsea left-back is on loan at Dortmund until the summer after joining in January. Dortmund are determined to keep Ian Maatsen, as well as Jadon Sancho, as a matter of priority but they were not able to put an option in place. Maatsen signed an extension to 2026 with Chelsea but that included a £35million release clause and it will almost certainly be met. Dortmund hope and believe the fact Maatsen has performed so well for them,…