13-year-old plays for Celtic's Under-20s

playKaramoko Dembele (Instagram/Karomoko99)

The old football adage of being old enough if you are good enough was put to the test on Monday, when 13-year-oldKaramoko Dembele featured for Celtic's Under-20 team.

playKaramoko Dembele pictured before his debut for Celtic U-20s at the age of 13 (Instagram/Karomoko99)

Dembele jumped several age groups ahead to come on in the closing stages of a 3-0 Development League win over Hearts at Cappielow Park.

Celtic's U20 squad had been depleted by international call-ups, prompting a particularly youthful and diminutive presence among the Hoops side in Greenock.

playKaramoko Dembele did not look out of place (Scottish Football Away Fans)

According to the club's website, Dembele, who replaced the 16-year-old Jack Aitchison in the 81st minute, "didn't look out of place and played his part in the closing stages."