The Swiss went to the Smithsonian's National Zoo, where they have two turtles between the ages of 70 and 100. Bencic even fed one of them - see the pics here (courtesy of Peter Staples/Citi Open):
After winning her first WTA title at the Premier-level event in Eastbourne in June, Bencic soared up the WTA Rankings to a new career-high of No.22, and after Wimbledon she went one higher to No.21.
With nothing to defend until the US Open - she didn't win a single WTA main draw match in the lead-up last year - even one strong result over the next few weeks might push her into the Top 20 for the first time, making the 1997-born Swiss the first player born in 1996 or later ever to reach that elite.
How will Bencic do in the US capital? Stay tuned on wtatennis.com all week to find out!