After falling behind 3-0 in the deciding set, American qualifier Frances Tiafoe battled back to take down No. 1 seed Stefanos Tsitsipas of Greece 3-6, 6-3, 6-4 Thursday in the second round of the Erste Bank Open in Vienna, Austria. Tiafoe saved three of four break points in the third set and broke Tsitsipas' serve twice en route to winning five straight games to make it 5-3. Tsitsipas smashed 11 aces in the match but com