Bookmaker William Hill said betting patterns indicated punters were convinced Marsh would be first out with the result "all over bar the counting".

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World number four Nikolay Davydenko continues to be investigated following the discovery of unusual betting patterns on his match against Argentine Martin Vassallo Arguello in Poland in August.

BBC: CHOOSE A SPORT

The ATP is currently investigating a match in Poland in which online gambling site Betfair voided bets on a match involving the Russian because of irregular betting patterns.

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Tuesday's final day of qualifying also sees 18-year-old Zhang, who has already won three qualifying matches, take on Ricky Walden, Jamie Cope face Mark Joyce and Stephen Lee, currently bailed following an investigation into suspicious betting patterns, playing Mike Dunn.

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