Serena Williams shows off mischievous side with prank on Citi Open chairman

Former World No.1 Serena Williams will begin her North American tour next week at the National Bank Open in Montreal. However, the legendary player has already made her presence felt by grabbing headlines in the capital city of Washington, D.C., where her sister Venus Williams returned to action after a year at the WTA 250 Citi Open Washington.

Although Venus lost to Canada's Rebecca Marino 4-6, 6-1, 6-4 in the first round, fans were beyond thrilled when they spotted the Williams sisters practicing together on Sunday. After the session, Serena set off for some sightseeing along with Citi Open Chairman Mark Ein.

The 40-year-old took to social media to share photos and videos of her day out with Ein. She she was seen riding a kick scooter in the streets as they visited the Washington Monument and the Lincoln Memorial.

Serena also played a prank on the tournament chairman at the Rock Creek Park Tennis Center. The parking lot has an allotted space for Ein with his name written on the board. Serena pasted a handwritten note over his name that read "parking for Serena Williams."

"Only those closest to me know that I’m a little mischievous. Zoom in…and must slide right. @markdein1 @cityopen," Williams wrote.

Ein made a video to show everyone what the tennis star did and joked about how she "made herself too much at home."

"You know how sometimes your friends come to town and they kind of make themselves a little too much at home. Well, this is taking it to a whole new level. Wow," Ein said.