England full-back Iain Balshaw has been ruled out of Saturday's match against South Africa after suffering a calf injury.

The 27-year-old Gloucester back will be replaced in Andy Robinson's team by Ben Cohen, who will start on the left wing.

Cohen had been axed by Robinson after Saturday's 25-18 defeat by Argentina at Twickenham - a record seventh consecutive defeat for England - but comes back into the side. With Balshaw forced to miss the match, his position at full-back is taken by Josh Lewsey, who switches from the wing.

It means Cohen will have started all three autumn Tests and therefore will not be available to face the Springboks next week. An agreement between England and Premier Rugby stipulates no player is allowed to start more than three of the four autumn games.

For 27-year-old World Cup winner Balshaw, it is the latest setback during an injury-hit career. He joined Gloucester from Leeds earlier this year and, after making a Guinness Premiership debut against former club Bath in September, an ankle injury then sidelined him for several weeks.

Lewsey though, is a high-class replacement, with England now fielding comfortably their most experienced back three unit of an autumn schedule that has so far produced defeats against New Zealand and Argentina.