India's floundering campaign in the ongoing series against England suffered another massive blow yesterday as pace spearhead Zaheer Khan was ruled out of the remainder of the tour after failing to recover from a hamstring strain and an ankle injury.

'Zaheer Khan is suffering from a recurrent right hamstring strain and a right ankle impingement. He will require a surgery for his ankle, followed by intensive rehabilitation for both the ankle and hamstring,' the BCCI said in a statement.

'He will need at least 14-16 weeks to recover completely. He will therefore not be able to participate in the ongoing Test series and subsequent Twenty20 International and ODI series against England,' it added.

Medium pacer R P Singh, whose last Test appearance for India was in 2008 against South Africa, has been called to replace Zaheer in the Test, ODI and the Twenty20 squads.

The limited overs series starts on 31 August with the one off T20 match.

'The All-India Senior Selection Committee has picked R P Singh as his replacement in the Indian squads for the Test series, and the T20 International and ODI series. R P Singh will join the team at the earliest,' the BCCI said.

The 25-year-old R P has been out of favour for quite a while and his last ODI appearance was in 2009 against Pakistan in the Champions Trophy.