The England defender said his father had injured ribs and trouble breathing after being caught up in the surge when hundreds of fans without tickets broke through security barriers to watch the final.
The Manchester United center back is part of a new generation of players who were drafted into the national squad to restore the reputation of English soccer after the nadir of 2016.
England will play a Euro 2020 warmup against Austria on Wednesday, and another against Romania on Sunday.
With Harry Kane rested, Maguire captained England for the first time — two months after being dropped from the squad over a legal case in Greece.
The Manchester United captain has since filed an appeal against his conviction and will get a retrial in a more senior court on a date yet to be announced.
The Manchester United captain also denied bribing the police.
Maguire was handed a 21-month suspended sentence on Tuesday following his arrest after a brawl last week on the Greek island of Mykonos.
Manchester United's Harry Maguire was found guilty of assault, swearing in public, and attempting to bribe a police officer.
United issued a statement saying Maguire, who was released from custody over the weekend, “continues to strongly assert his innocence” and would appeal.
England manager Gareth Southgate has named a 24-member squad for the side's Nations League matches against Iceland and Denmark.
Maguire, who was released from custody over the weekend, is not expected to be present at the trial on the nearby island of Syros.
Maguire and the two other defendants were charged with multiple instances of assault and battery in regard to a fight they had with others on Mykonos.
Maguire, one of the most high-profile soccer players in England, was pictured being escorted into a police station in the Aegean island of Syros, which neighbors Mykonos, by plain-clothed officers on Friday.
Manchester United captain Harry Maguire said that Paul Pogba apologised to teammates after his handball offence led to the side conceding a penalty against West Ham.
Manchester United defeated Norwich City 1-2 (on extra time) to seal a spot in the semifinals of the FA Cup.
Roy Keane lashed out at Maguire and De Gea and said he wouldn't let them on the bus after the match.
Manchester United defender Harry Maguire said that the environment feels safe and that he enjoyed his first day upon return to training.
In an exclusive fans' Q&A on Manchester United's official website, centre-back Maguire said he is focused on bringing more silverware to Old Trafford when it is decided it is safe for football to resume.
Apart from this, Maguire is also coordinating the Manchester United first team's response to the newly launched Players Together NHS fund as the team's captain.
Harry Maguire suffered a hip problem in last Saturday's FA Cup tie with Wolves and missed Tuesday's Manchester derby loss in the Carabao Cup.
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