Barkley impressed in his substitute appearance.
"I was pleased for Ross," said Osman. "It shows the manager's belief in him that he threw him on in a tight game.
"He didn't disappoint. I've spoken to him about earning the manager's trust; to keep the ball ticking over in certain areas and then when he has a chance to show what he's capable of, and I thought he showed a bit more maturity than he had done in the past."