• Sears was coaching Ana Ivanovic when he passed out in 2016• Briton is Andy Murray’s father-in-law and Kontaveit’s coachNigel Sears smiles weakly about the prospect of returning to Rod Laver Arena on Wednesday, having collapsed and almost died there during a match four years ago.

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British coach, a slim and fit 6ft 3in – and Andy Murray’s father-in-law – was mentoring Ana Ivanovic when, he believes (although he cannot be certain) a toxic buildup from the sushi he used to eat in large quantities struck him down.