Argentina coach Gerardo Martino has played down the severity of Angel di Maria's foot injury, as 'nothing serious'.
Portugal boss Fernando Santos said he was glad Cristiano Ronaldo's return to Old Trafford had been a success.
It will be Ronaldo versus Messi at Old Trafford on Tuesday when Portugal face off against Argentina.
Barcelona teammates Neymar and Lionel Messi were both on target as Brazil and Argentina claimed international friendly wins.
Carlos Tevez has been included in the national squad for the first time in three years for next month's friendlies.
Dunga denied insinuating drug use in the Argentina camp after he was filmed pinching his nose and pointing at the rival bench.
Lionel Messi missed a first-half penalty as Brazil beat Argentina in a fiercely contested "Superclasico" friendly in Beijing.
A brilliant performance from Angel di Maria spurred Argentina to a crushing win over world champions Germany.
Argentina will have the chance to exact revenge of sorts when they travel to Dusseldorf for a friendly international with Germany.
Germany defenders Jerome Boateng and Mats Hummels are both out of Argentina friendly, while midfielder Sami Khedira is doubtful.
World Cup finalists Germany and Argentina renew their rivalry in a pick of international friendlies happening this week.
Germany's Mesut Ozil is unlikely to play in the friendly against World Cup finalists Argentina on Wednesday.
Argentina captain Lionel Messi will miss his side's friendly against world champions Germany on Wednesday due to a groin strain.
Julio Grondona, president of the AFA and FIFA vice-president, has died at the age of 82 in a Buenos Aires clinic.
Alejandro Sabella, who steered Argentina to the SWC final, has decided to quit as coach, Argentine has media reported.