The 25-year-old has become the first signing of the Pep Guardiola era at the Etihad Stadium.
The outspoken manager was due to play a starring role in the annual charity game.
The former Brazil international will be joining a star cast led by director Dimitri Logothetis.
The 18-year-old striker earned his place in England's 23-man squad after a string of impressive performances.
The south Wales club are braced for a window in which their best players could look to leave.
Ounas made 30 appearances in all competitions scoring six goals and providing three assists.
Long will spearhead Martin O'Neill's limited side in France.
The Black Cats must improve their squad in order to avoid yet another close shave with relegation in 2016/17.
England take on Portugal in their final warm-up clash before they travel to France for Euro 2016 beginning on 10 June. Find out where to watch live.
IBTimes UK looks at how Mark Hughes can improve his squad to fight for a place in Europe.
The 19-year-old midfielder previously claimed he would like to return to La Liga outfit.
The Reds legend could be about to end his 29-year association with the Premier League giants.
Real Madrid striker suggests decision linked to north African roots and not blackmail scandal.
The United captain called his new boss 'one of the best managers in the world'.
The 30-year-old midfielder is not a certain starter for England boss Roy Hodgson this summer.
Southampton full-back to miss friendly with undisclosed knock which is not deemed to be serious.
The Magpies could negotiate his departure for around £15m.
The Spanish international could leave Barcelona for just €8m.
The 22-year-old Dutchman was signed by Van Gaal and also played under him with the national team.
Uruguayan forward refuses to rule out summer exit from Parc des Princes.
The England international was out-of-contract at Old Trafford after 10 years with the club.
Timothy Fosu-Mensah will become the third player after Rashford and Borthwick-Jackson to agree a new deal in recent days.
Henrikh Mkhitaryan, contracted to Dortmund until 2017, is subject to interest from Arsenal and Chelsea.
The 20-year-old forward helped the Tykes to achieve promotion from League One.
Alex Pritchard will be allowed to leave Tottenham in the summer and has attracted interest from Premie League new boys Middlesbrough.
Marseille's Diarra has been ruled out of the tournament due to a knee problem.
A guide to this year's European Championship in France.
Koeman is expected to sign a new contract at St Mary's this summer.
Manchester United are reportedly ready to let him go for around £14m.
The 34-year-old Swede has been frequently linked with a move to Old Trafford in recent weeks.