THEY are drug testers, who have the right to conduct tests on tennis players at any time and without appointment. But when they showed up at the home of Serena Williams they got more than they expected.

She called 911 when she discovered what she thought was a prowler at 6 one recent morning, and then fled to the panic room in her mansion, a refuge of the kind made famous in the movie ‘Panic Room’ starring Jodie Foster.

Officers swiftly responded to Serena’s call for help, but soon left once the identity of the ‘intruder’ was established.