But the Manchester City star made his presence felt in the comment section of Dele Alli's Instagram post - and Chelsea defender Ben Chilwell was his chosen victim.
Burberry ambassadors Alli and Chilwell swapped football for fashion alongside the likes of Naomi Campbell, Lily Cole and Cara Delevingne at a star-studded event on Monday night.
Arsenal stars Bukayo Saka and Martin Odegaard were also in attendance, along with current Tottenham forward Heung-min Son and ex-Spurs star Gareth Bale.
All posed for photos on the red carpets in daring outfits - with Chilwell donning a questionable blue and white tank top with an open jacket.
This caught Grealish's attention and the England star was quick to poke fun at his international teammate.
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Commenting on an image of Alli and Chilwell on Instagram, Grealish said: "Tell Chilly to keep his jacket on next time."
Despite playing for Premier League rivals, Chilwell and Grealish are close friends having risen through the England ranks together.
They have roomed together on Three Lions duty numerous times and their friendship dates back to time spent together with the nation's youth system.
England's rival stars often banter with each other on social media as manager Gareth Southgate promotes a more wholesome culture compared to yesteryear.
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Earlier this season, Tottenham's James Maddison and Liverpool's Trent Alexander-Arnold had a caption war over Luis Diaz's infamously disallowed goal at Spurs.