The Manchester City midfielder was a surprise exclusion from Gareth Southgate’s final squad.
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His lack of game-time for the Premier League champions is believed to be the main reason he missed out.
But Grealish – who is a notorious party-lover – has made plans to enjoy the unexpected time off.
He has jetted to Dubai where his brother Kevan and a group of pals have booked a massive apartment.
Kevan shared pictures on social media of the location – which is where Grealish will cheer on England from.
He is also planning a holiday with his long-term partner Sasha Attwood, who had been expecting to join Wags in Germany.
Sasha has not joined Jack and his brother in Dubai and has remained in Cheshire.
A source said: “Jack intends to enjoy the unexpected time off.”
Grealish led Manchester City’s celebrations into the early hours after his side secured a historic fourth successive Premier League title.
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The star was seen sporting a £2,000 outfit and posted a video of himself singing Natasha Bedingfield’s Unwritten as the party at a Greek restaurant went on until 5am.
Players including Rodri and Kevin De Bruyne were seen looking worse for wear as they stumbled out with minders following the celebratory meal at Fenix in Manchester.
It followed a 3-1 win over West Ham United to complete City’s sixth league success in seven seasons under their manager Pep Guardiola.
Grealish wore a striking Gucci suit – a brand for which he is an ambassador – to a celebratory dinner.
He later posted a clip on his Instagram Stories of him singing the lyric ‘the rest is still unwritten’, while holding a drink and showing off his winner’s medal.