The 2019 US Open champion cites persistent physical and emotional struggles that have kept her off court for large swaths of the last two seasons.

The former No. 1 won a career-high three titles, became Spain's first WTA Finals champion, and returned to the Top 3 of the rankings.

The Russian was No. 6 on the list leaving Wimbledon, but a sensational second half propelled him past everyone else.

By winning his second 4 hour and 11 minute match in three days, Djokovic scaled new career heights at 34, and made his 19th major title his most impressive yet.

His inclusion for January's men's team event means the world No. 1 now appears likely to chase a 10th Australian Open and record-breaking 21st major at Melbourne Park.

Since first rising to the top spot on July 4, 2011, he's spent 66.9% of the time there.

A review of the latest Davis Cup edition, the 2021 ATP season, and where the generational struggle in men’s tennis goes from here.

The momentous title run was a major catalyst for Djokovic, who went on to lift three of the four majors in 2011.

Andrey Rublev and Daniil Medvedev, who also guided their nation to February's ATP Cup, both shined Sunday with straight-set victories.

The American collected a combined 21 majors, with three coming in singles, and later worked at the University of Southern California for more than 45 years.

The 28-year-old might be in paradise, but that didn't stop her from getting in a hit and beach workout.