Saido Berahino, the West Bromich Albion striker, has been disciplined by his club after footage came to light showing him inhaling nitrous oxide in his car after a defeat by Manchester United last month.

Breathing in the gas is not illegal but can pose serious health risks. The 20-year-old has apologised for failing to set "the right example" but has been involved in controversy already this season, having been involved in a dressing-room row with team-mate James Morrison. The Scot is understood to have hit Berahino during the bust up.

"[Inhaling nitrous oxide] was very poor judgment on my part," he said. "I won't be doing it again."

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