The Athletic trying to uncover the truth: https://www.givemesport.com/1710099-jack-grealish-report-unpicks-england-stars-complicated-relationship-with-southgate
“..Well, a recent report from The Athletic has aimed to shed light on the situation ahead of the final Group D game against the Czech Republic at Wembley.
The report lists five key points that are influencing the relationship between Southgate and Grealish.
Firstly, the England manager is a fan of Grealish but doesn't totally trust him to do what he wants on the pitch. Rather pertinently, both have differing ideas on Grealish's best position while the player himself suspects his party-boy image could be counting against him.
It's also been reported that Grealish had a poor relationship with England U21 manager Aidy Boothroyd, who was a close ally of Southgate's during their time together in the England setup.
The final reason concerns Southgate's overall handling of the squad, with certain players believing he has favourites in the dressing room - including Jordan Henderson, Mount and Sterling.
That is not to say that the relationship between the pair is strained
"Any talk that Gareth has an issue with Jack, or doesn’t like him as a person, couldn’t be further from the truth,” said a source close to the squad.
The disagreements over his best position and his image, which does have undertones of a bygone era that Southgate has made clear strides to eradicate, could well be counting against Grealish as he bids to establish himself in the XI..”