New Zealand tennis player Lulu Sun has caused an almighty upset at Wimbledon, beating the number 8 seed Qinwen Zheng in her first round match. Sun, who was born in Te Anau, only switched allegience to New Zealand earlier this year, having previously played for Switzerland. She was ranked 115 places lower than her opponent, but came through with a 4-6 6-2 6-4 win in a match that lasted almost 2 hours. Tennis commentator Dave Worsley spoke to Corin Dann