Top 5 Photos, July 21: A relaxed Djokovic back in Tokyo

Two-time Grand Slam winner Garbine Muguruza was among those who practiced Wednesday in Tokyo.

German Jan-Lennard Struff trained with countryman Philipp Kohlschreiber.

The Olympic flag flies above the Ariake Tennis Park.

World No. 1 Novak Djokovic enjoyed his first day back in the Japanese capital, where he triumphed in 2019.

Dayana Yastremska looks over during her team's practice session Wednesday.