Many stars of the sport have made vigorous returns to form from injuries, childbirth, burnout and other factors in recent years. Novak Djokovic, Serena Williams, Ashleigh Barty, Juan Martin del Potro just to name a few. Those are singles standouts, though.
In 2019, perhaps the most hotly anticipated comeback belongs to Bob Bryan, sidelined in 2018 by his not-entirely-reliable, 40-year-old body, which underwent hip surgery last August.