Advertising

Sunday's Tennis Channel Live postgame show recapped the beginning of the 2019 fourth-round matches, including Stan Wawrinka and Stefanos Tsitsipas's five-set thriller.

Other highlights from the show:

—Jon Wertheim discusses the 2020 US Open scenarios being considered

—Serena Williams, Gael Monfils, and more players take part in Frences Tiafoe and girlfriend Ayan Broomfield's Racquets Down, Hands Up challenge

—2019 Australian Open semifinalist Danielle Collins gives her hiatus update

Watch it all here: