Roy Hodgson faces an anxious wait to see if Ashley Cole will be fit for England's crunch qualifiers against Montenegro and Poland.
Jose Mourinho substituted Cole in the second half of the Blues' 3-1 win at Norwich and revealed afterwards that the left-back was suffering from a rib injury.
Mourinho hopes the 32-year-old will be fit for the game against the Montenegrins at Wembley on Friday and the visit of Poland four days later.
''He had something in his ribs that we need to assess, but hopefully it's fine," the Chelsea manager said after the match on Sunday.
''He goes for a scan now, when we arrive (back in London), on his ribs. I hope he is fine.
''I want England to do (well), so I hope he's fine.''
Although Hodgson has a top-class back-up in Leighton Baines, the England manager will need experienced heads like Cole around the camp for the two matches.
England top Group H by just one point thanks to their draw in Ukraine last month and the only way they will definitely qualify is if they win their final two games.
The squad will meet up for the first time at St George's Park in Burton on Monday.
The England manager will spend the next four days trying to put together a masterplan to defeat Montenegro, who held the Three Lions to a 1-1 draw in Podgorica in March.
The 66-year-old has already been forced in to making one change to his starting XI after Arsenal winger Theo Walcott was ruled out with a stomach problem.
Hodgson was at White Hart Lane on Sunday to watch Andros Townsend play on the right flank Walcott usually commands for England.
The 22-year-old has enjoyed a fine start to the season with Spurs, but Hodgson may be reluctant to throw the winger into the team as he is as yet uncapped.
A more sensible alternative would be playing Daniel Sturridge, who scored his eighth goal of the season on Saturday, on the right side of a front three that also contains Wayne Rooney and Danny Welbeck, who both missed the stalemate in Kiev.
Hodgson will have been happy to see Jack Wilshere respond to his critics by scoring in Arsenal's 1-1 draw against West Brom on Sunday afternoon.
The England manager highlighted the midfielder, who was pictured smoking a cigarette last week, as one of the team's potential match winners for the upcoming clashes at Wembley last week.