According to The Athletic, Saints are monitoring his situation as Chelsea are yet to determine the centre-back's future.
The 19-year-old impressed during his loan spell at Huddersfield, making 32 appearances in his first season in professional football. His contract with the Blues will only expire in 2025.
It's no surprise that other clubs want to take advantage of the Chelsea academy. Last season, two of its graduates became regular starters elsewhere.