Tony Hans-Joachim Martin is a German former professional road bicycle racer. Martin was known as a time trial specialist, and is a four-time world champion in the discipline – having won the title in 2011, 2012, 2013 and 2016 – which is joint-most with Fabian Cancellara. He also won a silver medal at the 2012 Summer Olympics in London, finishing runner-up to Bradley Wiggins in the event. Martin was also part of four world championship-winning team time trial squads, with Omega Pharma–Quick-Step/Etixx–Quick-Step, in 2012, 2013 and 2016, and with Germany in the mixed relay time-trial in 2021.

The men's time trial of the 2011 UCI Road World Championships cycling event took place on 21 September 2011 in Copenhagen, Denmark.