Tennis Today features Andy Murray and Ashleigh Barty.
World number two feeling philosophical.
Women's competition looking fierce.
Serena Williams was made to work for her US Open win.
Early session produces mixed bag for WTA stars.
"I played some pretty awful stuff," says Australian.
Ashleigh Barty is one win away from returning to the top.
Barty is a fan of Sakkari and Sakkari is a fan of Barty.
Australian's eight week reign to come to an end.
Naomi Osaka favourite to reclaim top spot.