They haven’t lost since July 22, 2010. Sunday night, they made it 26 straight wins, “which ties the second longest pro sports team win streak in history held by Major League Baseball’s 1916 New York Giants,” according to a World Team Tennis release.

A few days back, a Kastles release noted that the team had “surpassed the NFL undefeated mark of 21 games, set by the 2003-2004 New England Patriots. Earlier this season, the Kastles exceeded the NHL record of 17 wins, held by the 1993 Pittsburgh Penguins.”

There. Tennis news. Now for the hair news: in preparation for the Olympics, Venus Williams — filling in for Serena — debuted the patriotic Princess Leia look on Sunday night.

“With red and blue streaks in her braided locks, Williams led the Washington Kastles to an easy 25-8 win over the visiting Kansas City Explorers for their 26th straight World Team Tennis victory,” Matt Breen wrote in The Post.

Pre-Princess Leia styling, Williams Instagrammed a photo of her red-white-and-blues with the caption “Olympic hair :)

See another image below, via @JenXperience.