United Cup: Bencic comeback thwarts Putintseva as Switzerland leads Kazakhstan 2-0
World No.12 Belinda Bencic opened her season with a tense 7-6(0), 6-3 win over No. 51 Yulia Putintseva on Day 1 of the United Cup, before Marc-Andrea Huesler extended Switzerland's lead to 2-0 against Kazakhstan in Group B,…