"The first half was not so good, we played without the intention to attack", Guardiola said. Bernardo put another good shift in today, coming up with an assist for David Silva's opening goal and completed some diligent work in the last ten minutes to win the ball back and see out the victory.
The 23-year-old England forward's previous deal at Etihad Stadium was due to expire at the end of next season.
He said: "It's well known we're delighted with him and would like him to continue".
The new deal comes in the week that German news magazine Der Spiegel alleged City overvalued sponsorship deals to help meet Uefa's Financial Fair Play (FFP) rules.
Saints’ Dez Bryant hurt, calls injury the ’ultimate test’
Every locker room that I've been in from middle school, high school, college to the pros, it's always been like a family. By the time the Saints decided that they needed a guy like Bryant, it didn't take long for them to come to an agreement.
It's not the first that time that Sterling, 23, has been the subject of media criticism with the England forward targeted for everything from buying sausage rolls to having a dirty auto.
A breakdown of the deal shows that the 23-year-old winger will earn about £275,000-a-week for the three-and-half years the contract will run.
A win for Mourinho's men would leave them six points behind their bitter local rivals heading into the final global break of the season.
A win for United would move them to within six points of their rivals but defeat would leave them 12 behind their neighbours. The vision the club gave me sold me straight away. "With the coaching staff and the players we have in this team it's the ideal environment to develop and get better". "The best way is to keep the ball and he did it with Leroy and Phil. If I'm producing and other players are producing that will only help the team".