Pellegrini wants to buy more players
English champions Manchester City are still in the market for new signings to boost their title defence.
Manager Manuel Pellegrini has already brought in Brazilian midfielder Fernando from Porto, French fullback Bacary Sagna from Arsenal and goalkeeper Willy Caballero from former club Malaga, but isn't convinced the additions are enough.
"I don't think the squad are complete yet, but we have six weeks before the transfer window closes," the Chilean said in Kansas, ahead of their friendly match against Sporting Kansas City yesterday.
"Perhaps there is the option to bring one or more players in or maybe one or two will leave our squad, but there is time for us to consider what is best for our team."
Pellegrini's purchasing plans may have been changed after striker Alvaro Negredo suffered a broken foot in the 2-1 friendly win over Scottish side Hearts in Edinburgh last Friday.
Pellegrini, who won the Premier League title and the League Cup in his first season in England last year, said the powerful Spaniard had an operation on Tuesday.
"Alvaro had surgery on his broken foot and will probably be out for two or three months," the former Real Madrid manager said.
"It is a blow for us because Alvaro is a very important member of our squad, so obviously we will miss him."
City will face AC Milan, Liverpool and Olympiakos on the US tour, before returning for the Community Shield, against FA Cup winners Arsenal on Aug 10.