Oxford have confirmed their pre-season schedule with two mouth-watering home friendlies against West Ham and Cardiff topping the bill.
Chris Wilder's side will host Premier League newcomers West Ham on July 17 as they get their preparations for the next League Two campaign underway. Cardiff will visit the Kassam Stadium on August 4.
The Us will also play three away games at non-league sides. They visit Didcot Town (July 20), Eastleigh (August 7) and and Oxford City (August 10).
Wilder's men also have three games on their American tour against Seacoast United Mariners (July 24), Seacoast United Phantoms (July 27) and a Jim Dedeus XI (July 30).