Britain Soccer FA Cup
Manchester City's Sergio Aguero, center, keeps Wigan's James McArthur at bay during their English FA Cup quarterfinal soccer match at the Etihad Stadi...
Manchester City's Sergio Aguero, center, keeps Wigan's James McArthur at bay during their English FA Cup quarterfinal soccer match at the Etihad Stadium, Manchester, England, Sunday, March 9, 2014. (AP Photo/Jon Super)
Spain Soccer Champions League
Manchester City's Kun Aguero, from Argentina, top right, attends a training session with his teammates at the Camp Nou Stadium in Barcelona, Spain, Tu...
Manchester City's Kun Aguero, from Argentina, top right, attends a training session with his teammates at the Camp Nou Stadium in Barcelona, Spain, Tuesday, March 11, 2014. FC Barcelona will play against Manchester City in a group H Champions League on Wednesday March 12. (AP Photo/Manu Fernandez)
Spain Soccer Champions League
Manchester City's manager Manuel Pellegrini, center, on the stands, waits for the start of the Champions League, round of 16, second leg, soccer match...
Manchester City's manager Manuel Pellegrini, center, on the stands, waits for the start of the Champions League, round of 16, second leg, soccer match between FC Barcelona and Manchester City at the Camp Nou Stadium in Barcelona, Spain, Wednesday March 12, 2014. (AP Photo/Manu Fernandez)
Spain Soccer Champions League
Barcelona's Jordi Alba, left jumps above Manchester City's Sergio Aguero during a Champions League, round of 16, second leg, soccer match between FC B...
Barcelona's Jordi Alba, left jumps above Manchester City's Sergio Aguero during a Champions League, round of 16, second leg, soccer match between FC Barcelona and Manchester City at the Camp Nou Stadium in Barcelona, Spain, Wednesday March 12, 2014. (AP Photo/Emilio Morenatti)
MANCHESTER, England (AP) -- Manchester City manager Manuel Pellegrini is hoping Sergio Aguero will be out for only two weeks after the striker injured his hamstring against Barcelona in the Champions League on Wednesday.
Aguero was substituted at halftime during the 2-1 loss at the Nou Camp and the Argentina forward underwent a scan in Manchester on Thursday.
A two-week absence would rule Aguero out of the derby match against Manchester United on March 25.
"Sergio will know on Saturday what he has," Pellegrini said on Friday. "I really don't know, but I don't think it is really very serious. I am hopeful he will (only) be injured for a couple of weeks."
The 25-year-old Aguero missed five games with a hamstring injury in February. He has 26 goals in 28 matches this season.
