Manchester United and Arsenal lock horns in the Premier League tonight.
Anthony Martial and Marcus Rashford are carrying injuries, so United may turn to 17 year old Mason Greenwood in attack.
Red Devils boss Ole Gunnar Solskjaer has faith in him.
"When you get him in the box he's dangerous," he said.
"What's pleased me about him as well in the period that we're in, is that he doesn't turn down chances to finish.
"When you're not 18 yet and you keep trusting yourself, you get the chances, so I'm not worried about him at all."
Arsenal could hand first Premier League starts of the season to Kieran Tierney, Rob Holding and Hector Bellerin in tonight's game at Old Trafford.
The trio made their first appearances of the campaign in last week's League Cup win over Nottingham Forest.
