Kobbie Mainoo Casemiro Manchester United 2023-224Getty Images

Man Utd star Casemiro praises 'complete player' Kobbie Mainoo and makes bold future prediction for teenage sensation

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  • Mainoo enjoying stellar breakout season
  • Casemiro hails youngster as "complete player"
  • Boldly claims starlet will be at club for "next 15 years"