(Reuters) - Jack Sock started a new tradition on Thursday, one that the 23-year-old hopes will become a regular occurrence as he carves out a successful tennis career.
The American overcame fourth-seed and world number 12 Kevin Anderson 1-6 6-4 6-4 to reach his first Auckland Classic semi-final, which he celebrated by taking off a shoe and giving one of his socks to a fan.
"We were talking about it in warm-up today," Sock told reporters in Auckland. "Jo (Jo-Wilfred Tsonga) has got his thing, a few people have their own things.
"I think with such a unique name that I have, we figured I might start a new tradition and give a sock away if I win.