He is part of the Zimbabwe Davis Cup team,[1] alongside his brother Courtney John Lock,where he has a win–loss record of 35–12.

[2] In November 2014, Lock won his first doubles title on the ITF Men's Circuit, playing alongside Jean-Yves Aubone in Niceville, Florida.

[citation needed] In February 2020, Lock won his first Challenger doubles title in Launceston, Australia playing alongside Evan King.

[citation needed] In June 2023, Lock reached his first Challenger singles final at the Medellín Open, losing to Patrick Kypson.

[citation needed] In September 2023, Lock made his ATP Tour debut as a qualifier at the 2023 Chengdu Open, losing to seventh seed Miomir Kecmanović in the first round.