World No 1 Andy Murray's shingles was diagnosed by his mother-in-law, who persuaded him to show her his intimate rash over the dinner table.

Murray was laid low after returning from January's Australian Open, where he suffered a shock loss to Mischa Zverev.

Speaking after a straight-sets win over Malek Jaziri in the opening round of the Dubai Duty Free Championships, Murray told a press conference: "I had a little bit of a rash from my bum round to my stomach.

"It wasn't terrible. Normally if you have a little bit of a rash and you scratch it it feels better. With that it was really, really painful.

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"I didn't think much of it at the beginning, but it was actually my wife's mum (who diagnosed it).

"We were having dinner and I said 'this is really irritating me' and she was like 'pull your pants down and show me, it might be shingles' and I was like 'okay'.

"And then the next day I got the doctor and she was right."

Murray's mother-in-law is Leonore Sears.

The 29-year-old looked jaded in Melbourne having had little time to recover and reset after his phenomenal end to 2016.

Five weeks and a period of enforced rest later he was back on court in Dubai.

Murray made a slow start and struggled to find his first serve but he got better as the match went on and emerged a comfortable 6-4 6-1 winner.

The first set was anything but straightforward for Murray, with 51st-ranked Jaziri playing with freedom and taking advantage of his opponent's difficulties on serve.

The Tunisian, in the best form of his career at 33, broke for 2-1 on a very fortuitous net cord but Murray hit straight back and broke serve again to win the opening set.