Nick Lester - US Open semi-finals preview
Stanislas Wawrinka gained the biggest success of his career on Thursday evening, trouncing Andy Murray in straight sets to reach the US Open semi-final.
He will now meet Novak Djokovic, who has now won 34 straight pre-semi-final matches at hard court majors.
Listen to the thoughts of Sky Sports commentator Nick Lester as he joins Dave Kelner to preview the men's and women's semi-finals as we draw towards the end of the season's last slam at Flushing Meadows.
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