Manchester City captain Vincent Kompany faces an additional three to four weeks on the sideline, manager Manuel Pellegrini has confirmed.
Kompany returned on Boxing Day after a month out with a calf injury but only lasted nine minutes before re-aggravating his muscle.
And now the Belgian will be out for another length of time as Pellegrini confirmed after the goalless draw at Leicester that he could be out for another month.
"Vincent has an injury, a second degree tear of the calf. It is the same calf but a different part," said Pellegrini. "We will see how long he will be out, but I don't think it will be less than three to four weeks.
"I am not a doctor, but with a muscle injury, it will be very difficult for him to be back in less than four weeks. But without him, we must continue to defend as did tonight."
Pellegrini said he thought his side outplayed Leciester, though he was content with draw.
"I think we did more than Leicester to win the game," Pellegrini said. "We had more possession, we had more attempts on goal, we had more clear options.
"But it was a tough game against a very good team, playing here away.
"And I always say, if you cannot win, don't lose it. But I think we did all from the beginning to the end to try to win the game. We didn't come here to try to draw the game."
After seeing his side fail to win on the road in the Premier League for a sixth successive game, goalkeeper Joe Hart urged third-placed City to improve on their away results.
"It's a clean sheet, that's the positive, but the negative is it's a game we should win," said Hart. "We're not where we want to be, but we're right in there without playing very well.
"We're in a good position and the two teams above us thoroughly deserve to be above us.
"We need to win all our home games and be damn hard to beat in our away games and take victories and enjoy it with our fans, who were great again tonight."
Raheem Sterling also said he thought City deserved more than a draw from the game at the King Power Stadium.
"I thought for the majority of the game we controlled the game and had a couple of chances to score as well, but they're a good team and they kept us out and that's what the league's about," Sterling said.