David Warner celebrates his century for Randwick-Petersham in Sydney grade cricket.

Disgraced Australian cricketer David Warner has hit form with a century but Brendon McCullum isn't letting the success go to Warner's head.

The former Black Caps captain took to social media to deliver a cheeky swipe at Warner and remind him that it was only grade cricket at Sydney's Coogee Oval.

Warner, who remains suspended from international cricket for his role in the ball tampering scandal in South Africa earlier this year, scored 155 not out for his Randwick-Petersham club on Saturday.

When he scored his 100, Warner leapt in the air with his trademark celebration.

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Cue his old sparring partner McCullum to bring Warner back to earth and remind him the century was scored in humble surroundings.

"Geez Davey! This celebration is the equivalent of Sir Ed Hillary giving it large climbing his front steps, post Everest! Hahaha," McCullum wrote on Twitter.

And the former Black Caps batting maestro wasn't done there.

He went on to, tongue-in-cheek, compare Warner's celebrations to Hugh Bowman - the jockey who rides wonder mare Winx - getting excited about winning a maiden race at a country meeting.

"Or in horse racing parlance, it's similar to if @HugeBowman was to give it "she's apples" in a maiden midweek at Wyong! Ahahahaha," McCullum wrote.

McCullum and Warner were fierce rivals when opening the batting for New Zealand and Australia in ODI's and T20's and have spent plenty of time together playing in T20 tournaments around the world.