Mats Hummels ex-wife has claimed the couple's seven-year-old son was unaware of his father's farewell match for Borussia Dortmund.
Hummels, who left Dortmund at the end of the 2023-24 season, returned to the club for a farewell match on Sunday.
A total of 80,000 fans were present at the Signal Iduna Park for a friendly between Dortmund and Juventus.
Hummels captained the Bundesliga side for the opening 18 minutes of the match, which officially marked his retirement from professional football.
The 36-year-old was cheered on by the crowd and his model girlfriend Nicola Cavanis, 26.
The former defender, who made 508 appearances in all competitions for Dortmund, however was not joined by his son Ludwig at the match.
His ex-wife Cathy shared a photo of their son on social media on the morning of the match, which featured a newspaper featuring Hummels and the headline 'Mats gut'.
She wrote: 'Someone stole my cap and read about Dad's farewell in the newspaper. So he knows what it was like'.
In a follow-up message later in the day, Cathy confirmed that she had been unaware of Hummel's farewell match and claimed she had only discovered it when reading the newspaper.
Instead, Cathy confirmed that she was on holiday with Ludwig at Lake Chiemsee in Bavaria.
'To clarify: We are not intentionally missing Mats Hummels’ final game. I put my son an extra newspaper so he can read everything,' she wrote.
'The reason we are NOT there is simply gone: We were NOT invited or knew about it. We are now enjoying our wonderful vacation with the family again.
'Goodbye Aussenrist 15. Congratulations on your remarkable career.'
Hummels reportedly declined to comment when contacted by BILD for a response to his ex-wife's claim.
Cathy had previously claimed in an interview with the Germany newspaper that she was 'raising my son more or less on my own'.
Hummels had split with his ex-wife in 2022 following seven years of marriage.
A year later Hummels went public with his new girlfriend Cavanis, who has earned fame by modelling for the likes of Nivea, Puma, Victoria's Secret, MCM, New Yorker and Tchibo.
Hummels had represented Dortmund in two spells, with the defender initially playing for the club between 2009 and 2016, before moving to Bayern Munich.
He returned for a second spell between 2019 and 2024, with the latter ending after an alleged bust-up with then manager Edin Terzic after the Champions League final last year.
Hummels then had a season in Serie A with Roma, before the veteran defender opted to retire this summer.
He claimed five Bundesliga titles during his career, two with Dortmund and three with Bayern, along with three German Cups and five Super Cups.
Hummels was a member of Germany's victorious World Cup winning side in 2014, while he was twice a Champions League runner-up with Dortmund in 2013 and 2024.