Grujic spent a portion of last season on loan in South Wales, helping the Bluebirds gain promotion to the Premier League.
“Some people criticise Neil Warnock because of the way his teams play. He's seen as someone who plays only long-ball football or a direct style, but he always has a clear plan. And most of the time, it works.
“It's about security. He doesn't want to lose many balls in the middle, he wants to play long and then to press high and win the ball closer to the goal. That's what Cardiff will do on Sunday."