"Boca Juniors are up next," said Ryan, looking ahead to the midweek Audi Cup in Munich.
"We’ve played Boca before and we know what they’re all about. They don’t do friendlies - it will be 100 miles an hour from the start.
"Then we’ll play either Milan or Bayern Munich. So from now on the games get tougher, with Valencia (at Old Trafford) and Chelsea in the (Community Shield) also still to come so we’ll have to step it up."
Tickets for United's home friendly against Valencia are still available. See manutd.com/tickets or call 0161 868 8000 for details.