The content originally appeared on: CNN CNN - Andy Murray defended the use of the underhand serve he deployed during his first-round win at Wimbledon over Australia's James Duckworth. After his 4-6 6-3 6-2 6-4 victory, Murray explained in his post-match press conference that the decision to use the uncommon shot, more often used by his friend and fellow tennis star Nick Kyrgios, was a tactical one. Funnily enough, Murray's execution of the serve wasn't especially pinpoint, with the shot […]