But the France global is with City on their summer trip to the United States and came off the bench for the last 30 minutes of their 3-0 win over Tottenham on Saturday night in Nashville.
Pep Guardiola's side took the lead in the 10th minute when England centre-back Stones headed home past Hugo Lloris from just outside the six-yard box.
Spanish 17-year-old Diaz added a third in stoppage time after two shots had been blocked.
An attempted from Nasri was blocked by a Tottenham defender but the ball fell for talented youngster Phil Foden, who saw his attempt saved by Michel Vorm.
Guardiola has been told he will be taking his Manchester City squad to the Far East for their pre-season tour - but he does not like China and would prefer to return to America instead.
"He's a guy who has unbelievable ability to keep the ball in small spaces". We take care of them when they are here.
"It's still pre-season. We try a few things, we got 90 minutes under our belts and that's good".
"We don't have too much more to spend but we are going to see", said Guardiola, speaking before Saturday's friendly against Tottenham (23:00 BST).
"You don't want to lose, of course, but we will learn and improve".
Last summer he arrived at the Etihad from Merseyside club Everton for a fee of £47.5m but he failed to impress last season, enduring a hard year in the City defence.
"Always with his feet he decides well, with the long and the short, he reads the decisions well, that's why I wanted him because to compete at the high level we need two excellent goalkeepers, if we don't have that, we can't".
"But we'll buy players to reinforce the team, like other teams around the world, until August 31st".