The tennis superstar scootered and danced around town, and faced off against sister Venus in a Citi Open practice session.

The Washington Kastles — defending World Tennis Team champions, mind you — announced a big move today: both Williams sisters, Serena and Venus, will play for D.C.’s WTT outfit this summer. “The historic opportunity to have both Serena and Venus on our team is a thrill, both for the success of our team and for our fans, whose support has been so integral to our success,” said team owner Mark Ein. World number one…

When the number of matches a team is scheduled to play at home over the course of an entire season numbers only seven, and among those, only one will include said team’s “star player,” it’s tough not to be cynical about exactly what purpose that star is filling. Are D.C. fans really supposed to feel a connection to Wimbledon champion Serena Williams, or is she just being offered up as added enticement to buy tickets?…