Yanina now leads Petra 3 - 1 in career matches .
Yanina now won their previous match , on a Deco - Turf hardcourt in the 4th round of this year 's US Open , 4 - 6 , 6 - 4 , 7 - 5 .
Yanina now leads Petra 3 - 1 in career matches , and won their previous match , on a Deco - Turf hardcourt in the 4th round of this year 's US Open , 4 - 6 , 6 - 4 , 7 - 5 .