American Stars Take Part In Favourites Quiz Mar 28, 2017 Americans Jack Sock, John Isner, Steve Johnson, Sam Querrey and Taylor Fritz answer quick-fire questions in ATP World Tour Uncovered presented by Peugeot. Tags: 2017 ATP World Tour Uncovered Jack Sock John Isner Sam Querrey Steve Johnson Taylor Fritz Share 0 Share on Facebook Tweet Tweet on Twitter +1 +1 on Google Plus