The Argentine duo scored in a pre-season friendly against a Malaysia XI on Monday and have been backed by their manager to continue improving
The pair were on target in City’s 3-1 win over a Malaysia XI on Monday and the Italian believes that their understanding will continue to flourish as his side look to defend the Premier League title next season.
Mancini told reporters: “We were confident two weeks ago and I'm even more confident today. Sergio played very well and his partnership with Carlos has continued from last season.
"They scored a goal each today which is good. Sergio also played in the wide position today but still produced the goods. Hopefully we can continue his good form in the coming season."
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Mancini also moved to play down an injury picked up by captain Vincent Kompany on the tour, insisting the defender will be back at full fitness in time to play Chelsea in the Community Shield in two weeks time.
Mancini added: “It's nothing serious. He had a scan and should be fit to play against Chelsea in the Charity Shield in two weeks' time.
"I'm happy we didn't have any injuries today despite playing two matches in four days. It is difficult but the players are alright now."