Neil Back is doubtful for England's RBS 6 Nations match against Italy at Twickenham next Sunday after suffering a calf injury in Saturday's 26-9 victory over Wales in Cardiff.
The Leicester flanker, substituted after straining his right calf against Wales, said: "There's a slight tear but we will know how bad over the next 48 hours.
"I've never had a calf strain before and I've had only three injuries that have kept me out for more than a week since I started my senior career.
"I've been very lucky, but I'm a quick healer and I'll be doing everything I can between now and whenever to get it right."
While England coach Clive Woodward, already almost certainly without injured props Phil Vickery, Julian White and Jason Leonard - along with back-row Lewis Moody - for the rest of the Six Nations campaign, is left to sweat over the fitness of Back, he had better news over Jonny Wilkinson.
The fly-half, who limped out with a knee injury in the second half in Cardiff, hopes to be fit to play for Newcastle at Wasps on Saturday.
Full-back Jason Robinson, who was also forced off against Wales with a knee injury, will undergo a precautionary scan this week and with his club Sale having no match scheduled this weekend, is hoping to be fit to face Italy.
The RBS 6 Nations Championship 2015 was not poised to go down as one of the more "vintage" Championships, though there was great anticipation as the action headed into its final day. What transpired was something that nobody could foresee: "The Greatest Day in Rugby's Greatest Championship."