Coventry City manager Russell Slade has said that Yakubu will be out for two weeks.
The Nigerian did not warm up before coming on in the 69th minute of the Sky Blues 3-1 defeat to Swindon Town and 'tweaked' his hamstring meaning that he spent some of the game walking round as he was unable to run.
Russell Slade told the Coventry Observer: “It was his hamstring so unfortunately he won’t be travelling tomorrow night.
“That’s why he wasn’t moving in the latter stages of the game.
“He’s in contact with the physio who’s looking at it, so we’ll have a look at it today.
“We don’t think it’s too serious but it’s probably going to be a couple of weeks.”