Lewis Moody's knee injury was described as a mild ligament strain by the Rugby Football Union (RFU) following the results of a scan on the England captain.
Moody, who began Sunday's 23-19 victory over Wales at Twickenham with his right knee heavily strapped, limped off after an hour to spark fears the injury-ravaged flanker might be ruled out of next month's World Cup in New Zealand.
However, the RFU issued a statement saying he had sustained only a mild strain.
He will not feature in Sunday's rematch with Wales at the Millennium Stadium but the medical team are optimistic of his progress.
England manager Martin Johnson names his team on Friday for the return match against Wales in Cardiff and will announce his 30-man World Cup squad on August the 22nd ahead of the final warm-up against Ireland in Dublin five days later.
Johnson's men begin their World Cup campaign against Argentina in Dunedin on September the 10th.