XtraTime VIDEO: Why did ATK Mohun Bagan sign Joni Kauko? Arunava Chaudhuri 3 years ago As XtraTime reports, Finland international midfielder Joni Kauko has been signed by ATK Mohun Bagan ahead of the Indian Super League – Season 8. XtraTime looks into the reasons why ATK Mohun Bagan signed a player like Joni Kauko.