England have been dealt a blow for their upcoming World Cup qualifier against Poland on Tursday.
With the Three Lions leading at 1-0 against Montenegro through a Wayne Rooney goal, Walker was booked.
Already one game away from suspension, he pushed Manchester City's Stevan Jovetic to the ground and was given a yellow card.
England will go into the game against Poland needing three points, and Walker shook his head in frustration after receiving the booking as realising the consequences of the decision.
It is especially a blow considering how well he had linked up with clubmate Andros Townsend, who Roy Hodgson said he picked largely due to their familiar combination.
The suspension leaves England with an unwelcome dilemma with Glen Johnson out injured at right-back, with Manchester United duo Chris Smalling and Phil Jones potential stand-ins.
How badly does this affect England for next week?
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