Liverpool manager Jurgen Klopp has confirmed James Milner suffered a hamstring injury  during a 0-0 draw with Manchester City but admitted he was unsure when the veteran midfield could return to action.

Milner went down clutching his leg in the 28th minute and was replaced a minute later by Naby Keita as two of the Premier League’s most irrepressible sides played out a scoreless draw.

“How much (serious)? It’s too early, I don’t know,” Klopp stated at his post-match press conference as he continued, “I asked him ‘big one?’ and he said ‘I don’t think so, but big enough that I go off.'”

With the international break ensuing, Milner will be in contention to be available for selection for Liverpool’s next game.

The Reds will next be in action when they travel to Huddersfield Town on October 20.

Usually, a hamstring injury takes anywhere from 1-3 three weeks to recover from, depending on the severity of the complaint.

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The club are likely to release an update in the next 48 hours after the versatile midfielder undergoes tests to determine the extent of the injury. The fact that Milner could walk off the pitch points at a short time away from competitive action.

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Liverpool were somewhat lucky to escape with a point as Riyad Mahrez blazed a penalty over late in the tie at Anfield.

Both sides, along with Chelsea, remain the only unbeaten units in the Premier League and coincidentally are joint-top in the table.

All three teams have a tally of 20 points from eight games, having drawn two and won six times so far.