Sport update: Wimbledon and goal-line technology

The National's online sports editor Iain Hepburn looks at tennis as Andy Murray, Roger Federer, Novak Djokovic and Jo Wilfried-Tsonga make up the last four.

Andy Murray defeated David Ferrer in the Wimbledon quarter-finals.
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The National's online sports editor Iain Hepburn talks about Andy Murray's Wimbledon quarter-final triumph over David Ferrer and the ongoing debate over goal-line technology in football.

Listen to our audio interview below.