Coronavirus, quick courts and a Clijsters comeback

The first time Kim Clijsters entered the US Open, all the way back in 1999, she faced a certain someone by the name of Serena Williams.

All these years later, three-time US Open champion Clijsters is back ready to play at Flushing Meadows, out of retirement at age 37 and entered in a Grand Slam tournament for the first time since 2012.

And Williams, less than a month from turning 39, is still at the top of tennis, the runner-up in New York each of the past two years and at four of the past seven major championships.