Leeds chief executive Angus Kinnear told the club's official website: "Jack has had messages from football fans from every club you can imagine and we all really appreciate it.

"Jack spent the night under the supervision of the medical staff from the club and he will return home today (Sunday).

"He will undergo some more tests this week and everything is looking well, but he won't train for the rest of the week.

"In the meantime we would like to thank everyone who has sent well wishes and once again thank Middlesbrough Football Club for all they did for Jack."

Clarke made his Leeds debut against Brentford in October and has gone on to make 17 appearances this season.

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