Tottenham defender Kyle Walker has apologised after pictures emerged of him appearing to take a legal high.
Photographs in the British media on Sunday showed the Tottenham full-back inhaling from a black balloon, believed to have contained nitrous oxide, also known as laughing gas.
It is thought that the images were taken over the close-season.
Inhaling the substance can have potential health repercussions including suffocation or even death, Walker took to Twitter to apologise for his actions and insist he has learned his lesson.
"Apologies for not commenting sooner on a story about me today. I've been training and am focussed on Tuesday's game for England," he wrote.
"Now I know the health risks, it was poor judgement on my part.
"I won't be doing this again and hope that no one else is influenced into putting their health at risk by my actions."
The defender will not face any action from the Football Association, who confirmed in a statement that the player had assured officials and manager Roy Hodgson of his remorse.
He will now hope to avert peoples' attention back on the pitch when England bid for a place in Brazil on Tuesday in their FIFA World Cup qualifier away to Ukraine.