/https%3A%2F%2Fsportsmole-media-prod.s3.gra.io.cloud.ovh.net%2F11%2F41%2Fam.jpg "In Pictures: Shanghai Masters - Day Four")
Top seed Rafael Nadal suffered a shock straight-sets defeat to Germany's Florian Mayer on day four of the Shanghai Masters.
Meanwhile, Britain's Andy Murray edged a step closer to defending his title after he beat Stanislas Wawrinka in three sets.
Browse the gallery below for images of the day's play.
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