It's far from ideal but Guardiola won't force any player back just for the sake of it.
And with Kevin de Bruyne, David Silva and Fernandinho at his disposal, it isn't too surprising Pep Guardiola is willing to take his foot off the gas in terms of transfer business.
"Jogi Lowe, the national trainer, decided what's the best for the national team".
"It is what it is", said the Spaniard.
"We spoke - they have to come back ready", he added. If the days before they are exhausted and they don't want to fight for the Community Shield, play at Arsenal, then stay on holidays.
"We can not forget what we have done, because it would be a big mistake, but we start again. If not, we'll wait for them". If they are not mentally and physically ready, they won't come back.
"Joe is our player, we will try and find solution", Guardiola said. 'We tried, we thought already it was done.
"My advice for all players is they have to go where they want to go, and in the end it would have been a mistake for him and for us if he'd made a decision to come here when he wanted to go with Maurizio and Chelsea".
He said: "I think I have the right characteristics as a footballer for the type of football that he likes to play, and the type of football that he teaches and passes on to his team".
"My advice is always go where they want to go".
Hart spent last season on loan at West Ham, however, the former England number one is in the squad as he searches for a permanent move away.
He last played for City in a Champions League qualifier against Steaua Bucharest in August 2016 having been axed by Guardiola following his arrival in Manchester two years ago.
Guardiola's title-winning squad had 16 players at the tournament in Russian Federation, including England's John Stones and Raheem Sterling, Spain's David Silva, Brazil's Ederson and Gabriel Jesus among others. He is training like a young guy of 18 years old. "He is with us".