The Nigerian was placed in an induced coma to aid his recovery from urgent abdominal surgery.

Any player on the pitch could be shown a blue card, PA understands, but not substitutes or team coaches.

The International Football Association Board (IFAB) has supported the move following a successful implementation in the grassroots game.

The International Football Association Board holds its annual general meeting in London on March 4th

The IFAB approved a trial on Wednesday.

IFAB rejected calls to trial temporary concussion substitutes at its AGM in Doha earlier this year.

The International Football Association Board rejected calls in the summer to bring in temporary concussion substitutes