Watch : Serena Williams Shares She Suffered a Knee Injury During Wimbledon ReturnWhen it comes to the U.S. Open, Serena Williams knows how to serve, on and off the court. "Going to the Open as a spectator is way different," she told E! "I can't say it's more fun, but I can say it's just different." "I get to hang out in the suites, I get to drink," Serena continued. (Fans attending the U.S. Open can also get limited-edition Heineken 0.0 cans inspired by the ticket designs from Serena's six championship wins.)