(Removes reference ‌to Mertens being top-ranked in second paragraph)SYDNEY, Jan 8 : Zizou Bergs stunned world number 18 Jakub Mensik and Elise Mertens outplayed Barbora Krejcikova as Belgium beat the Czech Republic 2-0 in the United Cup quarter-finals on Thursday to set up a last-four clash with ‌Switzer

SYDNEY, Jan ‌8 : Zizou Bergs stunned world number 18 Jakub Mensik and Elise Mertens outplayed Barbora Krejcikova as Belgium beat the Czech Republic 2-0 in the United Cup quarter-finals on Thursday to set up a last-four clash with Switzerland.Mensik struggled with double faults in the ‌second set as Bergs