Rojo these days plays for Boca Juniors and was lining-up against their arch-rivals River Plate, spending the last two years in his home country.
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Boca Juniors were winning 1-0 and with the game entering its seventh minute of stoppage time, the centre-back was sent off for a reckless challenge.
The 32-year-old had a moment of madness where he kicked midfielder Nicolas de la Cruz in the head while trying to clear the ball.
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The River Plate midfielder was left in a heap on the ground and the referee brandished a red card.
Rojo then returned to the field after the final whistle to celebrate wildly.
The defender was a combustible character during his seven years at Old Trafford, but remarkably did not get a red card during any of his 122 appearances.
Rojo was a £16million signing for United from Sporting CP in 2014 and was a regular starter during his first three seasons.
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His role diminished from the 2017/18 season, before joining Estudiantes on loan in 2020.
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He made his return to Argentina permanent in 2021 when he signed for Boca Juniors.
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