Yorke was asked what advice he'd give the midfield pair.
"The best advice I can give them is to not get caught up in the fact they're playing for Manchester United, but just to go out there and express themselves and do their best for the team," Yorke told manutd.com.
"There is a reason they are both at the club - the manager has seen their talent and believes they are good enough for Manchester United and will bring something different to the team. Both players need to believe that as well. I'm sure the other players, as they always do, will make both of them feel very welcome and once they settle in I'm sure they'll be top players for us."