Professional tennis player Jack Sock pumps his fist after winning a point against his coach Alex Bogomolov Jr. at the Cabarrus Country Club in Concord, NC on Wednesday, January 20, 2021.

Sock, who incidentally is the most famous volunteer assistant tennis coach Davidson ... Jack Sock practices with his coach Alex Bogomolov Jr. at the Cabarrus Country Club in Concord, NC on ...